If the height of a cylinder is decreased by 10% and radius increased by 10%, then volume changes by:
Show answer & explanation
Correct answer: B
Explanation
Increase in radius = 10%
Decrease in height = 10%
New volume = (1 + 10/100)² × (1 − 10/100) = 1.089
Change = 1.089 − 1 = 0.089
Percentage change = 8.9% increase