GMAT
题目
The volume of cylinder A with radius R and height H is K. What is the volume of another cylinder B whose radius and height are each double the radius and the height of cylinder A?
解析
已知条件：
圆柱A的半径 = R
圆柱A的高 = H
因此，圆柱A的体积 = 3.14*R^2 *H=k
圆柱B的半径 = 2R
圆柱B的高 = 2H
因此，圆柱B的体积 = 3.14*(2R)^2 *2H=8*3.14*R^2 *H = 8k
选项E正确
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