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Multiple choice

The curved surface area of a right circular cylinder of radius 2 cm is 264 cm2. The height of the cylinder (in cm.) is-

  1. 42

  2. 14

  3. 10.5

  4. 21

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Curved surface area of a cylinder is 2πrh. Substituting r = 2 and CSA = 264: 264 = 2π * 2 * h, so h = 264/(4π) = 66/π. Using π ≈ 22/7, h = 66 * 7/22 = 21 cm.

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