Question

When each edge of a cube is increased by 50%, by what percent is the surface area of the cube increased?

Answer 1

125 % increase

Explanation:

assume a cube of side 10

then each side surface area = 100 * 6 = 600 units

now consider sides 15 (+50%)

each side = 225 .... 225 * 6 = 1350

(1350 - 600)/600 = 1.25 = 125 % increase