9.
250kg of water per minute is to be drawn from a well 150m deep. An electric pump of
can be used. (g = 10m/s)
all
(1)
sagt
(2) 7 horse power
6 horse power
Dest
(3)
8 horse power
(4)
9 horse power
Dut
Answers
answer : option (3) 8 horsepower
mass of water in time tmin , m = 250t kg
so, mass of water in t sec , m = 250t/60 = 25t/6 kg
height of water, h = 150m
so, potential energy of water , U = mgh
= 25t/6 × 10 × 150
= 25t × 10 × 25
= 6250t J
power of electric pump = energy required to pump/time taken
= 6250t/t = 6250 w
we know, 1 horse power = 746 watt
so, 6250 w = 6250/746 = 8.378 ≈ 8 hp
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Answer:
Hey mate your correct answer is option 3....
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