If side of a cube is increased by 100%, then by what percentage is the surface area of the cube increased?

300%

Ratio of ,      Old        :     New

side              1          :        2

Area             1²         :        2²

                   1           :        4

Percentage increase in surface area = \(\frac{ 4 - 1 }{1}\) × 100%

= \(\frac{ 3 }{1}\) × 100%

= 300%

The correct answer is Option (3) → 300%