SSC GD Constable 17 Nov 2021 Shift 2 Paper

12 spherical balls of radius 10 cm are dropped in a bucket that is full of water up to the brim. The water that flowed out is collected in a cylindrical jar of radius 20 cm. What is the height (in cm) of water in the jar? (Take $\mathit{\pi }=\frac{22}{7}$ )