If each edge of a cube, of volume $V,$ is doubled, then the volume of the new cube is

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Solution

The correct option is C 8V
Let $^{'} a^{'}$ be the edge of cube.
Volume, $V$ of cube $= a^{3}$
Edge of new cube $= 2 a$
Volume of the new cube $= (2 a)^{3} = 8 a^{3}$
$= 8 V$

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