Problem 44943. Calculate Amount of Cake Frosting

Created by Pooja Lalan

Solve Later

{"parts":[{"partUri":"/matlab/document.xml","contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?><w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>Given two input variables</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:rFonts w:cs=\"monospace\"/></w:rPr><w:t>r</w:t></w:r><w:r><w:t> and</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:rFonts w:cs=\"monospace\"/></w:rPr><w:t>h</w:t></w:r><w:r><w:t>, which stand for the radius and height of a cake, calculate the surface area of the cake you need to put frosting on (all around the sides and the top).</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>Return the result in output variable</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:rFonts w:cs=\"monospace\"/></w:rPr><w:t>SA</w:t></w:r><w:r><w:t>.</w:t></w:r></w:p></w:body></w:document>","relationship":null}],"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","target":"/matlab/document.xml","relationshipId":"rId1"}]}

<div style = "text-align: start; line-height: 20.4333px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: rgb(0, 0, 0); white-space: normal; "><div style="block-size: 73px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 36.5px; transform-origin: 407px 36.5px; vertical-align: baseline; "><div style="block-size: 42.5px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 21.25px; text-align: left; transform-origin: 384px 21.25px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 79px 8px; transform-origin: 79px 8px; unicode-bidi: normal; "><span style="">Given two input variables</span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 2px 8px; transform-origin: 2px 8px; unicode-bidi: normal; "><span style=""> </span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 4px 8px; transform-origin: 4px 8px; unicode-bidi: normal; "><span style="font-family: Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace; perspective-origin: 4px 8.5px; transform-origin: 4px 8.5px; ">r</span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 14px 8px; transform-origin: 14px 8px; unicode-bidi: normal; "><span style=""> and</span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 2px 8px; transform-origin: 2px 8px; unicode-bidi: normal; "><span style=""> </span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 4px 8px; transform-origin: 4px 8px; unicode-bidi: normal; "><span style="font-family: Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace; perspective-origin: 4px 8.5px; transform-origin: 4px 8.5px; ">h</span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 276.5px 8px; transform-origin: 276.5px 8px; unicode-bidi: normal; "><span style="">, which stand for the radius and height of a cake, calculate the surface area of the cake you need to put frosting on (all around the sides and the top).</span></span></div><div style="block-size: 21.5px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.75px; text-align: left; transform-origin: 384px 10.75px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 109.5px 8px; transform-origin: 109.5px 8px; unicode-bidi: normal; "><span style="">Return the result in output variable</span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 2px 8px; transform-origin: 2px 8px; unicode-bidi: normal; "><span style=""> </span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 8px 8px; transform-origin: 8px 8px; unicode-bidi: normal; "><span style="font-family: Menlo, Monaco, Consolas, &quot;Courier New&quot;, monospace; perspective-origin: 8px 8.5px; transform-origin: 8px 8.5px; ">SA</span></span><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 2px 8px; transform-origin: 2px 8px; unicode-bidi: normal; "><span style="">.</span></span></div></div></div>

Solve

Solution Stats

43400 Solutions
15824 Solvers

Last Solution submitted on Aug 15, 2022

Last 200 Solutions

Problem Comments

9 Comments

9 Comments

Show 6 older comments

Alessandro A on 14 Feb 2020

This problem is yummy! :-)

Rafael S.T. Vieira on 2 Jun 2020

Simple & interesting.

Ghofran AL-NABELSI on 14 Jun 2020

The same as the surface area of a cylinder but without calculating the area of the bottom surface (circle) of the cylinder:
Original: A=2πrh+2πr2
Modified: A=2πrh+πr2

Weihua Huang on 22 Jun 2020

Having finished all 15 problem just to see what is the leading solution looks like. Then I realize smaller size doesn't mean the solution is better, often it is at the price of understand-ability.
Remember, in most cases, you write program for humans not for machines.

Alexis Snyder on 5 May 2021

Nice

Sven Stähs on 23 Nov 2021

If you're considering trying to get your solution size down to 10 -- like the leading solution -- don't bother! They wrapped all their code in a regex statement so that the code size cannot be calculated anymore (the algorithm only sees the regex call, not what that regex actually does). ANY code you write like this is going to be of size 10 but is not going to be actually faster than the proper solution. Probably the exact opposite in fact.

Raul Galdeano Pazos on 15 Feb 2022

Hey everybody! I may have a question about this exercise! I solved it, however, it comes to my mind one question. Furthermore, I solved using the area of the circle + the area of one of its sides, considering that is a cylinder. I do not know if there are other ways to solve it, so if you could share your way with me, I would be very grateful!

Many thanks in advance!

Dyuman Joshi on 15 Feb 2022

@Raul, the way you solved it is correct. The formula remains the same however people simplify it

Holger Zaman on 22 Jun 2022

Code in any programming language should always be readable with as little effort as possible. But regex are often hard to read - so don't look for brevity, but for clarity.

Solution Comments

Solution 8532790

1 Comment

1 Comment

migue ange cc on 13 Jun 2022

Unless the cake isn't floating in the freezer receiving frost from all sides, then the base won't catch the cold if it is placed usually.

Solution 8191215

1 Comment

1 Comment

Charles Seitz on 1 May 2022

At first i wrote the code like the bottom of the cake needed to be frosted

Solution 7837980

1 Comment

1 Comment

Laura Malehorn on 6 Apr 2022

I am confused because I don't think that this answer is the surface area of a cylinder.

Solution 6970604

1 Comment

1 Comment

Haoran Tian on 26 Nov 2021

easy question

Solution 6930959

1 Comment

1 Comment

Josh Klueber on 21 Nov 2021

easy

Solution 6919459

2 Comments

2 Comments

Khagendra Mandal on 19 Nov 2021

This Problem has some info missing they did not specified for which shape we have to find surface area, I request the Creator to rectify it.

Dyuman Joshi on 19 Nov 2021

Where would you frost a cake? Give it a thought.

Solution 6842024

2 Comments

2 Comments

Sven Stähs on 23 Nov 2021

surely wrapping all the code into a regular expression, which hides it from the code size calculation algorithm of Cody, is cheating... This way you can get a size of 10 on nearly any problem. Thanks for messing up the solution chart for the rest of us...

Aniket Kumar on 15 Feb 2022

Thanks to @SvenStahs, I now know why I can't achieve the minimum size. Thanks bud! And you guys need to fix this.. :(

Solution 6841004

2 Comments

2 Comments

强郭 on 7 Nov 2021

unbelieveble

Isabella Stellitano on 14 Nov 2021

Good problem

Solution 6820265

1 Comment

1 Comment

A.G.M.Fuad Hasan Akanda on 3 Nov 2021

Interesting

Solution 4692648

Solution 4554553

3 Comments

3 Comments

Rainbownight on 7 Jan 2021

the ans is 0, because the cake will be eaten.

瑞宋 on 9 Jul 2021

I need help.I just couldn't use the expressions correctly

Adam Cheng on 29 Jul 2021

haha

Solution 2990278

3 Comments

3 Comments

航喻 on 25 Sep 2020

that's good

Gokul Krishna N on 2 Nov 2020

thanks

MATTHEW WONG on 28 Mar 2022

thanks

Solution 2626153

1 Comment

1 Comment

Priya Narayan on 29 Jun 2020

calculating surface area except the base area

Solution 2502182

1 Comment

1 Comment

bowen sui on 9 Jun 2020

easy

Solution 2477813

1 Comment

1 Comment

Mateus Cruz on 5 Jun 2020

I do not think this exercise is correct. As one should not put frosting below the cake, the area of the cake to put frost on is the area of the circle on top of it plus the area of the "bent" rectangle on its sides. Thus:
function SA = func_frosting2(r,h)
ARectangle = pi*r*h;
ACircle = pi*r^2;
SA = ARectangle + ACircle;

I think the current solution is misleading

Solution 2458598

1 Comment

1 Comment

Rafael S.T. Vieira on 2 Jun 2020

simple and fun.

Solution 2244202

1 Comment

1 Comment

srisai vangara on 29 Apr 2020

just tricky one.

Problem Recent Solvers15824

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 44943. Calculate Amount of Cake Frosting

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers15824

Suggested Problems

More from this Author13

Problem Tags

Community Treasure Hunt

Problem 44943. Calculate Amount of Cake Frosting

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers15824

Suggested Problems

More from this Author13

Problem Tags

Community Treasure Hunt

Players