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If each edge of a cube is doubled,(i)   ...

If each edge of a cube is doubled,(i)            how many times will its surface area increase?(ii)           how many times will its volume increase?

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(i) surface are of cube= `6 xx (side)^2`
`= 6 xx (2 xx side)^2`
`= 4 xx (6 xx side^2)`
`= 4` times
(ii) volume = `a^3 = (2a)^3 = 8a^3`
=8 times
answer
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