Question:If each edge of a cube is doubled, then its volume : 

A is doubled 
B becomes `4` times 
C becomes `6` times 
D becomes` 8` times 

+ Answer
D 

+ Explanation
Let original edge`= a` Then, volume`= a^3`

New edge`= 2a.` So, new volume

`= (2a)^3 = 8a^3.`

:. Volume becomes `8`  times.

+ Report

Irin Moni

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