If the radius of a sphere increases by 10%, what would be the change in the surface area of the sphere?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 21%
Given that
The radius of a sphere = 10 % increase
The change in the surface area of the sphere = the successive of 10 % and 10%
= 10 + 10 + 10 * 10 /100 = 10 + 10 + 1 = 21%