Capacity of a water tank built at the height of 10 m is 2000 litres . A lift pump of 2kW is used to fill this tank . If the effici

2 thoughts on “Capacity of a water tank built at the height of 10 m is 2000 litres . A lift pump of 2kW is used to fill this tank . If the effici”

1. Answer:

   Let’s see what’s given in the question,

   Power of pump= 2KW = 2000 watts

   Height= 10 metre

   Time=1 minute= 60 seconds

   As we know

   Power- Work done/ Time

   And Work done= mgh

   So,

   Power= mgh/ Time

   Keeping the value, in Sl units

   2000 watt = (mx 9.81×10 )/ 60

   m= mass of water = 1223.2415 kgs

   If you wish to convert it in litres then,

   Density= Mass / Volume

   Or, Volume= Mass/ Density

   Volume=1223.2415/ 1000

   Volume = 1.2232415 meter cube

   And if you want in litres, then

   1 meter cube = 1000 litres

   So, Volume=1.2232415 × 1000 litres

   = 1223.2415 litres

   So your pump is giving out large amount of water in 1 minute, 1223.24 litres, don’t waste it.

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2. Answer:

   Thus, the efficiency of the pump should be 27.78%.

   Reply