Multiple choice

If a right circular cone of height 24 cm. has a volume of 1232 cm3 ,then the area (in cm2) of curved surface is -

  1. 550

  2. 704

  3. 924

  4. 1254
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

For cone: V = (1/3)πr²h = 1232, h = 24. So (1/3)πr² × 24 = 1232, giving r² = 1232 × 3/(24π) = 49, thus r = 7 cm. Curved surface area = πrl = πr√(r² + h²) = π × 7 × √(49 + 576) = π × 7 × 25 ≈ 550 cm². Options B (704), C (924), D (1254) are incorrect - likely using wrong formulas or calculation errors.

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