If the areas of three of the faces of a rectangular solid are 6,10, and 15, what is the volume of the solid ?

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问题 If the areas of three of the faces of a rectangular solid are 6,10, and 15, what is the volume of the solid ?

选项 A、30
B、90
C、150
D、300
E、450

答案A

解析 若一个长方体3个面的面积为6,10和15,该长方体(rectangular solid)的体积是多少?
解:本题的正确答案是(A)。设长方体的长,宽,高分别为l,w,h,则有:lw=6,wh=10,
hl=15。长方体体积为lwh,上面三项相乘得900,so, lwh=30
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