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

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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