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A thin piece of wire 40 m long is cut into 2 pieces. 1 [#permalink]
27 Jan 2007, 22:22
A thin piece of wire 40 m long is cut into 2 pieces. 1 pieces used to make a circle with radius r. The other piece used to make a square.
Which of the foll. represents the total area in square meters of the circle and square in terms of r?
Answer: pie r^2 + (10 - 1/2*pie*r)^2
Solution please? Thanks!