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Junior | Next Rank: 30 Posts
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by goods81 » Sat Mar 07, 2009 11:08 am
Can anybody help me on this? Question is from GMAT prep software.

File is in word format...thanks in advance.
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by karmayogi » Sat Mar 07, 2009 1:31 pm
Given radius of circle is equal to r.
Circumference of circle = Length of one part = 2* Pi * r
Length of other part = 40 - 2 * pi * r
Suppose, a is the length of a side of the sq. Therefore,
Perimeter of sq. = length of other part
4*a = 40 - 2*pi*r
a = 10 - Pi * r / 2

Total area = Area of circle + Area of sq.
= Pi * r^2 + a ^2
=Pi*r^2 + (10 - Pi * r/2)^2
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