Question

find the ratio of volumes of sphere and hemisphere

Answer 1

hope it helps you..,.

Answer 2

$\green{volume \: of \: sphere = \frac{4}{3} \pi {r}^{3} } \\ \\ \green{volume \: of \: hemisphere = \frac{2}{3} \pi {r}^{3} } \\ \\ \red{ratio : } \\ \\ \blue{ = > \frac{ \frac{4}{3}\pi {r}^{3} }{ \frac{2}{3}\pi {r}^{3} } = 2 : 1 }$