If side of a cube is increased by 100%, then by what percentage is the surface area of the cube increased?
Answer & explanation
Correct answer: option 3
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%