## 01 How to calculate the discharge and the velocity of flow

**Problem 1**

Compute the discharge of water through 75 mm pipe if the mean velocity is 2.5 m/sec.

**Problem 2**

The discharge of air through a 600-mm pipe is 4 m^{3}/sec. Compute the mean velocity in m/sec.

**Problem 3**

A pipe line consists of successive lengths of 380-mm, 300-mm, and 250-mm pipe. With a continuous flow through the line of 250 Lit/sec of water, compute the mean velocity in each size of pipe.