Question

If the total surface area of a cube is 2400 cm then, find its lateral surface area.​

Answer 1

the formula for total surface area of cube is 6×a×a that means 6×a×a=2400 then value of a will become 20 then formula for lateral area of cube is 4×a×a =4×20×20=1600

Answer 2

Surface area of the cube = 2400cm

side = l

surface area= 6l²

2400=6l²

l²=$\frac{2400}{6}$

l= 20

lateral surface area = 20cm