Multiple choice

The curved surface area of a frustum having slant height 14 cm and the base radii 3 cm and 2 cm is

  1. 220 cm2

  2. 200 cm2

  3. 320 cm2

  4. 300 cm2
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A Correct answer
Explanation

Curved surface area of a frustum = pi * l * (r1 + r2). CSA = (22/7) * 14 * (3 + 2) = 22 * 2 * 5 = 220 cm^2.

AI explanation

The curved surface area of a frustum formula is pi times the sum of the base radii times the slant height. Substituting the values gives pi times (3 plus 2) times 14, which equals pi times 5 times 14. Using pi as approximately 22 divided by 7, the product of 22 divided by 7, 5 and 14 is 220. The result is 220 cm2.

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