If the diameter of the base of a right circular cylinder is reduced by 
and its height is doubled. Then the volume of the cylinder will be ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 ie decrease by 
.
Assume radius = 3
h = 1
Now,
π r² h = π × 9 × 1
After decreasing,
r = 2, h = 2
π r² h = π × 8
Decrease = (1/9) × 100 =