Question

how many litres of water a hallow right circular cylinder of radius 1 m and height 7 m can hold
​

Answer 1

21,980 ltr.

explanation:

volume of right circular cylinder = $\pi r^{2} h$ $\pi *1^{2} *7 = 7\pi =7*3.14 m^{3} = 21.98 m^{3}$

1 $m^{3}$ of volume contain 1000 ltr of water.

so 21.98 $m^{3}$ of volume will contain $21.98 * 1000\ ltr$ of water

hence, the cylinder contain 21,980 ltr of water.