A farmer connects a pipe of internal diameter 20 cm from a canal into a cylindrical tank in her field, which is 10 m in diameter and 2 m deep. If, water flows through the pipe at the rate of 3 km/h, in how much time will the tank be filled?

**Solution:**

Let cylindrical tank be filled in **x **hours

Diameter of pipe **cm**

Radius of pipe **cm ** **m**

Speed of water flowing through pipe **km/h **** m/h**

Volume of water flowing through pipe in** 1** hour

Volume of water flowing through pipe in** x** hours

Diameter of cylindrical tank **m**

Radius of cylindrical tank **m**

Height of cylindrical tank **m**

Volume of cylindrical tank

**According to given condition we have:**

**Volume of water flowing through pipe in x hours =Volume of cylindrical tank **

hrs** ** minutes