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Class 10 Mathematics Medium Mcq English Medium

A frustum has radii 12 cm and 6 cm. Which expression gives its volume at height 5 cm?

Question
A frustum has radii 12 cm and 6 cm. Which expression gives its volume at height 5 cm?
5p(144+36+72)/3
5p(144+36)/3
5p(18)/3
5p(144-36)/3
Answer
5p(144+36+72)/3
Detailed Explanation
Frustum volume is (1/3)ph(R² + r² + Rr), giving 5p(144+36+72)/3. — Examisthan.com
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