Question:
If each side of a cube is doubled, then its volume
(a) is doubled
(b) becomes 4 times
(c) becomes 6 times
(d) becomes 8 times
Solution:
(d) becomes 8 times
Suppose that the side of the cube is a.
When it is doubled, it becomes 2a.
New volume of the cube $=(2 a)^{3}=8 a^{3}$
Hence, the volume becomes 8 times the original volume.
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