If the radius of a sphere is doubled, then its surface area will be increased by:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 300%.
Given that
If the radius of a sphere is doubled,
So, the radius is increasing by 100%
Formula used
The surface area increased by = r + r + r2/100
Where r is the increased radius % of a sphere
Calculation
The surface area increased by = 100 + 100 + 1002 /100 = 100 + 100 + 100 = 300%