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[ GMAT ]
討論串[計量] pp1-ps-72
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設X與(40-X)兩段. X為circle,r為半徑. (40-X) 為square,(40-X)/4為邊長. 周長of circle = 2πr = X -----【1】. Area of circle + Area of square. =πr^2 + [(40-X)/4]^2. 【1】代入.
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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.
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