Question

4. A tank is situated at a height of 60 m from a pond. The capacity of the tank is 20. m2. If this tank is completely filled by a pump from the water of pond in 3 h 16 min then what is the power of pump? * A​

Answer 1

Explanation:

Here, Volume of water =30 m^3

t=15 min=15×60 s=900 s

Height,h=40 m

Efficiency, η=30%

Density of water =10^3 kg m^-3

∴ Mass of water pumped =Volume×Density

=(30 m^3 )(10^3 kg m^−3 )=3×10^4 kg

P output = W/t= mgh/t

= (3×10^4 kg)(10 ms^−2)(40 m) / 900s ( all divided by 900 seconds)