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GMAT PREP - Geometry

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by Blast » Fri Nov 28, 2008 11:34 am
Even though I got this question right, my calculation is not 100% correct. Could anyone please explain how to best tackle this question? Thanks!
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by dmateer25 » Fri Nov 28, 2008 3:28 pm
Circumference of a circle =2pi(r)
Area of square=4s

2pi(r)+4s=40
4s=40-2pi(r)
s=10 - 0.5pi(r)

so one side of the square=10 - .5pi(r)
area of square = (10 - .5pi(r))^2

area of circle=2pi(r)

Total area would be:

pi(r^2) + (10 - .5(r))^2
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