Question

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The surface area of a sphere of radius 7cm is ?​

Answer 1

Explanation:

In formula π is a constant and its value is 227 or 3.14. Hence the surface area of the given sphere is 616cm2.

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Answer 2

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=>. Radius of sphere = 7cm

By using formula:

=>. Surface area of sphere = 4πr²

$= > . \: 4 \times \frac{22}{7} \times {7}^{2}$

$= > . \: 4 \times \frac{22}{7} \times 7 \times 7$

Here, 7 and the another 7 will cut with each other.

$= > . \: 4 \times 22 \times 7$

$= > . \: 616$

=>. Hence, surface area of sphere is 616 cm².

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