An overhead tank of capacity 10 k liter is kept at the top of building 15 m high. Water falls in tank with speed 
m/s. Water level is at a depth 5 m below ground. The tank is to be filled in 1/2 hr. If efficiency of pump is 67.5% electric power used in hecto watt is –
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(2)
Sol. Work done by motor
= mgh + 
mv 2 = 225 × 10000 Joule
Power of motor = 
W
Electric power used
= 
× 
200 W
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