Find the volume of a sphere of radius $2.1 c m$ .

34.8 c m^{3}

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35.8 c m^{3}

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38.8 c m^{3}

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36.8 c m^{3}

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Solution

The correct option is D $38.8 c m^{3}$
Volume of sphere $=$ $\frac{4}{3} π r^{2} = \frac{4}{3} \times \frac{22}{7} \times 2.1 \times 2.1 \times 21$

$=$ $38.8$ ${c m}^{3}$

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