Multiple choice

If the radius of a hemisphere is 7 cm, its curved surface area is

  1. 308 cm2

  2. 803 cm2

  3. 380 cm2

  4. 830 cm2
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A Correct answer
Explanation

Curved surface area of a hemisphere is 2 * pi * r^2. Using r = 7 and pi = 22/7, Area = 2 * (22/7) * 49 = 2 * 22 * 7 = 308 cm^2.

AI explanation

The curved surface area of a hemisphere is given by the formula 2*pi*r^2. Substituting the radius of 7 cm gives 2 * (22/7) * 7^2. This simplifies to 2 * 22 * 7 = 308 cm2. The result is 308 cm2.

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