Question

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

Answer 1

Answer:

Step-by-step 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

Answer 2

Answer:

A

Step-by-step explanation:

I believe that I did this before.