Question

A water pump of power 1.5kw drawn water through a mean height of 10m to fill a tank 4m × 3m × 4m calculate the time taken to fill up the tank

Answer 1

4*3*4=48m^3

1.5 kwHi Muskan,

Given Power = 5 kW=5000 W

Time taken = 1 minute = 60 sec

begin mathsize 14px style The space work space done space equals space Potential space energy space at space height space 20 space straight m Power space equals fraction numerator Work space done space over denominator Time end fraction equals mgh over straight t straight m equals fraction numerator straight P cross times straight t over denominator gh end fraction space equals fraction numerator 5000 space straight W space cross times 60 space sec over denominator 9.8 space straight m divided by straight s squared cross times 20 space straight m end fraction straight m space equals 1530 space kg end style