Question

An incompressible liquid flows through a horizontal tube as shown in the following fig. Then the velocity v of the fluid is

• A. 3.0 m/s
• B. 1.5 m/s
• C. 1.0 m/s
• D. 2.25 m/s

Answer 1

The correct option is C

1.0 m/s

If the liquid is incompressible then mass of liquid entering through left end, should be equal to mass of liquid coming out from the right end.

$\therefore M=m_1+m_2\Rightarrow A{v}_1=A{v}_2+1.5A.v$

$\Rightarrow A\times 3=A\times 1.5+1.5A.v\Rightarrow v=1m/s$