A 10 H.P. motor pumps out water from a well of depth 20m and fills a water tank of volume 22380 litres at a height of 10m from the ground. The running time of the motor to fill the empty water tank is ( $g = 10 m s^{- 2}$ )

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A motor pump lifts 6 tonnes of water from a well of depth 2m to the first floor of height 35m from the ground floor in 20 minutes. The power of the pump (in kW) is [g=10ms−2]

The correct option is B 1.85P=(mass×g×height)timeP=6×10×(35−(−2))20×60=1.85kw

A motor pump lifts $6$ tonnes of water from a well of depth $2 m$ to the first floor of height $35 m$ from the ground floor in $20$ minutes. The power of the pump (in $k W$ ) is $[g = 10 {m s}^{- 2}]$

The correct option is B $1.85$
$P = \frac{(m a s s \times g \times h e i g h t)}{t i m e}$
$P = \frac{6 \times 10 \times (35 - (- 2))}{20 \times 60} = 1.85 k w$