The radius of a sphere is increased by 25%. What is the increase percent in surface area?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 56.25%.
The radius of a sphere is increased by 25%
% increase in surface area of sphere= x + x + x2/100 = 25 + 25 + 252/100 =56.25%