If the radius of a right circular cylinder is decreased by 20% while its height is increased by 50%, what is the percentage change in its volume?

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A Decreased by 4%
B Increased by 4%
C Decreased by 10%
D Increased by 20%

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Answer: A. Decreased by 4%

Answer: A) Decreased by 4%
Explanation: V = πr²h. New volume = π(0.8r)²(1.5h) = 0.64 × 1.5 × πr²h = 0.96V. So the volume decreases by 4%.

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If the radius of a right circular cylinder is decreased by 20% while its height is increased by 50%, what is the percentage change in its volume?

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