Question

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?

Answer 1

(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