Question

7. How does the surface area of a cube is changed, if its edge is
(1) alved
(ii) doubled?
​

Answer 1

Step-by-step explanation:

ANSWER

Surface area of cube=6a

2

Is sides of cube is doubled

New surface area is =6×4a

2

Divide 2 by 1

=24a

2

surfaceareaofcube1

surfaceareaofcube2

=

6a

2

24a

2

=4times

Surface area increased four times

Volume of cube= a

3

Volume of new cube= (2a)

3

=8a

3

Divide 2 by 1

volumeofcube

volumeofnewcube

=

a

3

8a

3

Volume increased 8 times