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The surface area (in m2m^2) of a sphere of radius 7 cm is:

Use π=227\pi = \frac{22}{7}

Solution

Correct Option: 1

Surface area of sphere = 4πr2=4×(22/7)×72=4×22×7=6164\pi r^2 = 4 \times (22/7) \times 7^2 = 4 \times 22 \times 7 = 616 cm2\text{cm}^2. Converting to m2\text{m}^2: 616×104=0.0616616 \times 10^{-4} = 0.0616 m2\text{m}^2.

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