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Q.
The volume of a rectangular solid is to be increased by 50% without altering its base. To what extent the height of the solid must be changed.
A.
50%
B.
40%
C.
0.3
D.
0.2
View Answer
Correct choice: A
Explanation:
Let l, b the sides of the base, so that the area of the base = lb remains constant. Let ‘h’ be the height of the solid. Volume of the solid, V = l× b× h. Since the volume is to be increased by 50%
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