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# Quick geometry questions

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Intern
Joined: 30 Apr 2014
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05 May 2014, 15:30
Hey everyone,

I'd like to preface this by saying that I don't know if this is the correct place for this question.

Anyways, I just took a KAPLAN CAT exam and I'm running through my mistakes.....many many mistakes...but I want to bounce this off of you guys.

The question:

A circular pool is surrounded by a circular walkway, and both the circular swimming pool and the entire circular region have the same center. If the radius of the swimming pool is 10 meters and the width of the walkway is 5 meters, how much greater than the surface area of the swimming pool is the area of the walkway.

Now this is a pretty basic question, I know how to go about solving it. However, the wording of this question tripped me up.

area of walkway - Surface area of swimming pool

area of the walkway - area of the swimming pool

In my thought process I was able to limit my answer choices down to 2 answers, but I didn't know (or what i thought i should know for the question) the formula for the surface area of a sphere so I guessed. To me, it seems this questions is misleading. Do you guys agree with me or was this a trap to test me on concepts of a circle vs a sphere?

Thanks!
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Economist GMAT Tutor Representative
Affiliations: Economist GMAT Tutor
Joined: 22 Aug 2013
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15 May 2014, 13:58
Hi there!

Just wanted to let you know that there is a section on these forums devoted to quant questions. You may have more luck posting your query there:

gmat-quantitative-section-7/

Regards,

Elizabeth
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Economist GMAT Tutor
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Re: Quick geometry questions   [#permalink] 15 May 2014, 13:58
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# Quick geometry questions

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