Question

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​

Answer 1

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 2

Answer:

Hey mate your correct answer is option 3....

Hope it helps!!

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