Question

The volume of cone is 1689.6 cm3. If its height is 2.8 cm then find the radius of the cone.

A 35 cm Correct Answer Incorrect Answer
B 36 cm Correct Answer Incorrect Answer
C 27 cm Correct Answer Incorrect Answer
D 24 cm Correct Answer Incorrect Answer

Solution

Let the radius of the cone be ‘r’ cm Therefore, (1/3) × (22/7) × r2 × 2.8 = 1689.6 Or, r2 = 1689.6 × (7/11) = 576 Or, r = 24 (since, radius cannot be negative) Therefore, radius of the cone = 24 cm

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