Question

The edge of two cubes are 8cm and 4cm respectively. Calculate the ratio of their surface area?​

Answer 1

surface area of cube with 8 cm edge:
area of each side: 8x8 = 64 cm2
surface area: 64x6 (a cube has 6 sides) = 384 cm2

surface area of cube with 4 cm edge:
area of each side: 4x4= 16 cm2
surface area: 16x6 = 96 cm2

Ratio : 96:384 = 1:4

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