# Filling the tank

**Geometry**Level 3

Water is flowing at a rate of \(15 \text{ km/hr}\) through a pipe of diameter 14cm into a rectangular tank which is 50m long and 44m wide.

Find the time required (in minutes) for the level of water in the tank to rise to 21 cm.

Take the value of pi as \(\dfrac{22}7\).