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Find the area of a sphere whose radius is 7 cm. (The value of π is 22/7)
Question

Find the area of a sphere whose radius is 7 cm. (The value of π is 22/7)

A.

225 cm²

B.

616 cm²

C.

144 cm²

D.

729 cm²

Correct option is B

Given:
The radius (r) of the sphere is 7 cm
Formula Used:
The surface area of a sphere of radius r is 4πr2
Solution:
Area of the sphere=4π×72 4×(227)×72 4×22×7 616 cm2\text{Area of the sphere} = 4\pi \times 7^2 \\\implies 4 \times \left(\frac{22}{7}\right) \times 7^2\\\implies 4 \times 22 \times 7\\\implies 616 \, \text{cm}^2\\​​

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