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`        A 20 hp electri motor pumps water from a well that is 10 meters deepinto a water tank 3 meters above the ground level.How long does it take the pump to fill a 2000 litres water tank ? `
one year ago

Arun
23346 Points
```							 Mass of water from well => density x volume => 1* 2000 gms or 2Kg.Work  = mgh => 2*10*10 => 200 J For height 10 m from the ground= >  2*10*3 => 60 JNet Energy required = > 200- 60 => 140 J1 HP =746 w = 746 J /sechence 20 HP = 1492 J/sectime required => 140/1492 = 0.093 sec
```
one year ago
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• Test paper with Video Solution
• Mind Map
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• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions