Find the volume and surface area of a sphere of radius $42 c m$ . $(π = \frac{22}{7})$ .

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Solution

Formula = V= $\frac{4}{3}$ $π$ $r^{3}$
V= $\frac{4}{3}$ x $\frac{22}{7}$ x $42^{3}$
V= $\frac{88}{21}$ x $74088$
V = $88$ x $3528$
Volume = $310464$

Surface Area for a sphere = $4$ $π$ $r^{2}$
= $4$ x $\frac{22}{7}$ x $42^{2}$
= $\frac{88}{7}$ x $1764$
= $88$ x $252$
= $22176$

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