Question

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

Answer 1

Formula = V= $\frac{4}{3}$ $\pi$ $r^3$
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 = $4$ $\pi$ $r^2$
= $4$ x $\frac{22}{7}$x ${42}^2$
= $\frac{88}{7}$ x $1764$
= $88$ x $252$
= $22176$