Dear Sir
 
This question is not exactly from this chapter but from the previous year.
 
What is the power required to raise 300 litres of water per minute through a height of 6m using a pipe of diameter 2.5m ?(g=10m/s^2)

Asked by Navya Benny | 22nd Apr, 2015, 08:21: PM

Expert Answer:

Given:
Volume of 300 litres of water, V = 0.3 m³
Density of water, ρ = 10³ kg /m³
t = 1 min = 60 sec
g = 10 m/s²
 
mass = volume × density
m = 0.3 × 10³ = 300 kg
Power required in pulling up this water to height of 6 m is given as,
 
begin mathsize 12px style straight P space equals space straight W over straight t space equals space mgh over straight t space equals space fraction numerator 300 space cross times space 10 space cross times space 6 over denominator 60 end fraction straight P space equals space 300 space straight W end style
 
Hence, 300 W power required to raise 300 litres of water per minute.

Answered by Priyanka Kumbhar | 23rd Apr, 2015, 10:57: AM

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