Multiple choice

The radius of a sphere is 7 cm. Find its surface area (use π = 22 7 ).

  1. 616 cm2

  2. 554 cm2

  3. 462 cm2

  4. 696 cm2
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A Correct answer
Explanation

Surface area of a sphere = 4 * pi * r^2. Using pi = 22/7 and r = 7: 4 * (22/7) * 7 * 7 = 4 * 22 * 7 = 616 cm^2.

AI explanation

The surface area of a sphere is calculated using the formula 4 times pi times the square of the radius. Substituting the given radius of 7 cm, we get 4 times (22 divided by 7) times 7 squared. This simplifies to 4 times 22 times 7, which equals 616. Therefore, the surface area of the sphere is 616 cm2.

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