Question

If edge of a cube is m it's surface area would be *​

Answer 1

Answer:

Answer

Let the edge of cube be 'a'

surface area = 6a^2

If the edge is doubled edge = 2a

surface area = 6\left(2a\right)^2

= 6\times4a^2

=24a^2

If increases by 4 times, i.e \frac{24a^2}{6a^2}

= 4

(ii)

Let the edge be 'a'

Volume = a^3

When edge is doubled, it is 2a

Volume = \left(2a\right)^3

=\ 2\times2\times2\ a^3

= 8a^3

Volue increases by 8 times

i.e. \frac{8a^3}{a^3}\ =\ 8