GMAT Practice Question Set #33 (Question 97-99)

Problem Solving Question #98: Area of a Diagram  
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A thin piece of wire 40 meters long is cut into two pieces. One piece is used to form a circle with radius r, and the other is used to form a square. No wire is left over. Which of the following represents the total area, in square meters, of the circular and the square regions in terms of r?

(A)

`pir^2`

(B)

`pir^2+10`

(C)

`pir^2 + 1/4pi^2r^2`

(D)

`pir^2 + (40-2pir)^2`

(E)

`pir^2+(10-1/2pir)^2`

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