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Power

A pump can li...

Question

A pump can lift water of 150 kg in 15 s, to store it in an overhead tank at a height of 15 m. Find the power of the pump. $(g = 9.8 m s^{- 2})$

1070 W

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1270 W

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1470 W

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1570 W

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Solution

The correct option is C
1470 W

Work done by the pump $= m \times g \times h = (150 \times (9.8) \times 15) J = 22500 J$

$P o w e r = \frac{W o r k d o n e}{t i m e t a k e n} = (\frac{22500}{15}) = 1470 W (a p p r o x)$

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