Question

Water is flowing steadily with certain initial velocity vertically down from a tap of area of cross-section $1.8\text{ cm}^2$. At a distance 25 cm below the tap, area of cross-section of the stream of the water is $1.2\text{ cm}^2$. The mass of the water flowing from the tap in a time of 10 s is (Acceleration due to gravity $=10\text{ ms}^{-2}$)}

• A. $4.8\text{ kg}$
• B. $1.2\text{ kg}$
• C. $3.6\text{ kg}$
• D. $7.2\text{ kg}$

Hint:

For liquid streams: \[ A_1v_1=A_2v_2 \] and use Bernoulli's principle or kinematics to relate velocities.

Answer 1

The Correct Option is A