Problem 133. Volume of this donut

Created by AMITAVA BISWAS

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"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:pPr><w:r><w:t>Given hole diameter a, and outermost diameter b, determine the volume y of the resulting donut.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

596 Solutions
167 Solvers

Last Solution submitted on Jun 19, 2021

Last 200 Solutions

Problem Comments

9 Comments

9 Comments

Show 6 older comments

the cyclist on 28 Jan 2012

I think the input are the radii, not the diameters, but I'm too lazy to check for sure.

Daniel on 28 Jan 2012

not really, the test sequence is simply wrong.

... on 25 Feb 2012

I spend 20mn to understand that the data are inverted, thanks :|

... on 25 Feb 2012

and also five minus it is not diameter but radii, a is outer radii and b the radii of the hole

Bart Vandewoestyne on 20 Apr 2012

It should be specified more clear what the input parameters mean exactly geometrically.

Peter Wittenberg on 3 Jun 2012

What a waste! Calling a radius a diameter. I got numbers that were off by a factor of 8, which turned out to be that I had used the information that a and b were diameters, whereas Bistwas used them as radii. Please correct the problem definition.

CC on 3 Jun 2012

If a is the hole diameter and b is the outermost diameter, how can a>b in the test cases?

Matthew Eicholtz on 21 Jul 2012

Problem is written incorrectly.

bainhome on 23 Aug 2014

test suite'answer is wrong if a and b is diameter instead of radius.

Solution Comments

Solution 2278977

1 Comment

1 Comment

Ali Osman Üstünel on 13 May 2020

Very good.

Solution 2278968

1 Comment

1 Comment

Ali Osman Üstünel on 13 May 2020

Good question.

Solution 1265983

1 Comment

1 Comment

Nishant Kumar on 11 Sep 2017

Volume should be y = pi^2/32*(a+b)i*(b-a)^2

Solution 840072

1 Comment

1 Comment

eggart on 29 Feb 2016

I wonder whether it it adequate to test correctness of double answers by equality. To do so discounts rounding errors and the fact that IEEE 754 does not guarantee the laws of arithmetic.

Solution 812950

1 Comment

1 Comment

William on 24 Jan 2016

So, when you say "diameter" you mean "radius"? And when you say "outer" you mean "inner"?

Solution 95031

1 Comment

1 Comment

CC on 3 Jun 2012

If a is the hole diameter and b is the outermost diameter, how can a>b in the test cases?

Problem Recent Solvers167

Problem Tags

geometry

Community Treasure Hunt

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

Start Hunting!

Problem 133. Volume of this donut

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers167

Suggested Problems

More from this Author100

Problem Tags

Community Treasure Hunt

Problem 133. Volume of this donut

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers167

Suggested Problems

More from this Author100

Problem Tags

Community Treasure Hunt

Players