Question

If the velocity head of a stream of water is equal to 40 cm then its speed of flow is approximately

• A. 1.0 m/s
• B. 2.8 m/s
• C. 140 m/s
• D. 10.3 m/s

Answer 1

The correct option is B 2.8 m/s

Velocity head is given by $\frac{v^2}{29}$

put it as 40cm = 0.4m

we get 0.4=$\frac{v^2}{2\times 10}$

$\Rightarrow v^2=8$ $[\Rightarrow$v=, $\sqrt{8}2.82m]$