Each edge of a cube is increased by 20% then the percentage increase in surface area of the cube is :

Each edge of a cube is increased by 20% then the percentage increase in surface area of the cube is :

A 144%

B 40%

C 44%

D 72.8%

Solution

Correct Answer: Option C

The surface area of a cube = 6\(a^2\) = 6\(side^2\)

New Surface area = 6 x 1.44\(a^2\)

Therefore, \(\frac{0.44a^2}{a^2}\times100\) = 44%