Problem 120. radius of a spherical planet

Created by AMITAVA BISWAS

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{"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>You just measured its surface area, that is the input.</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>"}]}

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5834 Solutions
2764 Solvers

Last Solution submitted on Mar 30, 2023

Last 200 Solutions

Problem Comments

8 Comments

8 Comments

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Martijn on 27 Jan 2012

imaginary planet?

Rahul Kalampattel on 20 Feb 2013

Negative surface area??

Christian on 28 Mar 2014

Cmon I'm sure a bit more challenging problems would'nt harm the a players brain...

goc3 on 29 May 2014

I would have preferred something a bit more challenging, like asking for the volume, given the surface area, rather than just the radius. Then, the two-step solution (solve for r from area, and volume from r) could be consolidated into one line (by raising the area amount to the 1.5 power and scaling the constants appropriately).

Mengyu on 11 Oct 2014

I don't know why the lead solution is like this with the regular expression. And i estime the time with tic and toc. It is not the best. What is the size here? can anybody tell me, thx.

Lily Waddell on 23 Dec 2015

dis probm is swwet yo i rly liekd i

fkk on 23 Jul 2017

wonderful!

fkk on 25 Jul 2017

Can anybody tell me what this question means? thx :)

Solution Comments

Solution 10061067

1 Comment

1 Comment

Ellie on 10 Dec 2022

question is just worded very weirdly

Solution 6059833

1 Comment

1 Comment

Sameer Pujari on 5 Jul 2021

Given Surface Area of Sphere. Find Radius of Sphere

Solution 1086271

1 Comment

1 Comment

sim yoke meng on 21 Dec 2016

lol

Solution 1020491

1 Comment

1 Comment

David Verrelli on 3 Sep 2018

This user (mohamed elbesealy) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV

Solution 441235

1 Comment

1 Comment

Joseph Pauwels on 10 May 2014

Im sorry what is x, the volume or the radius.

Solution 155510

1 Comment

1 Comment

Peter Lindberg on 24 Jul 2013

Smart

Solution 51710

3 Comments

3 Comments

Nicholas Howe on 13 Apr 2012

Why is the size 2 for this solution?

Noah on 28 Jun 2012

This funciton fails the assertions when I run it, and it becomes size 14. I am confounded.

Yaroslav on 31 Jan 2013

I am a bit bewildered about the size too. According MathWorks, it ought to be higher due to the inspection algorithm (see <>).

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Problem 120. radius of a spherical planet

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Problem 120. radius of a spherical planet

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Last 200 Solutions

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Problem Recent Solvers2764

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