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The curved surface area of a cone is 1914 cm2 and the diameter is 42 cm. What is its slant height? (Use π = 22/7)

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The curved surface area of a cone is 1914 cm² and the diameter is 42 cm. What is its slant height? (Use π = 22/7)

Correct answer: B

Explanation

Radius = 21 cm. Curved surface area = πrl, so 1914 = (22/7) × 21 × l = 66l, which gives l = 29 cm.

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