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Class 10 Mathematics Medium Mcq English Medium

A frustum has radii 6 cm and 3 cm. Which expression gives its volume at height 9 cm?

Question
A frustum has radii 6 cm and 3 cm. Which expression gives its volume at height 9 cm?
9p(36+9+18)/3
9p(36+9)/3
9p(9)/3
9p(36-9)/3
Answer
9p(36+9+18)/3
Detailed Explanation
Frustum volume is (1/3)ph(R² + r² + Rr), giving 9p(36+9+18)/3. — Examisthan.com
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