Question
Find the volume of a sphere whose diameter is:$2.1m$

Answer

Diameter $= 2.1\ m,$
Radius (r) $=\frac{2.1}{2}=1.05\text{m}$
Therefore volume $=\frac{4}{3\pi\text{r}^3}$
$=\frac{4}{3}\times\frac{22}{7}\times(1.05)^3=4.851\text{m}^3$

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