Question

A spherical stone whose density is $2$ $gm/c{m}^3$ is $42$ cm in diameter. What is the weight of the spherical stone?

Answer 1

Since the weight of the solid are proportional to their volume
$\therefore$ weight of the spherical stone
=Volume X density
$=\frac{4}{3}\times \frac{22}{7}\times 21\times 21\times 21\times 2$ gram
=77. 616 kg