Question

Water is flowing steadily in a river. A and B are the two layers of water at heights $40 \text{ cm}$ and $90 \text{ cm}$ from the bottom. The velocity of the layer A is $12 \text{ cm/s}$. The velocity of the layer B is

• A. $15 \text{ cm/s}$
• B. $21 \text{ cm/s}$
• C. $27 \text{ cm/s}$
• D. $36 \text{ cm/s}$

Hint:

Velocity gradient ($dv/dy$) is constant for ideal steady river flow.

Answer 1

The Correct Option is C