Question

The lateral surface area of a cube is 400cm². Its total surface area is

_______
a)600cm² b) 2400cm² c) 500cm² d) 650cm²

Answer 1

A

Explanation:

I believe that I did this before.

Answer 2

Explanation:

Lateral surface area of cube = 4a²

4a² = 400

a² = 400÷4

a² = 100

a = √100 = √10*10

a = 10 cm

Total surface area = 6a²

= 6 * 10²

= 6* 100

= 600 cm²