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5.work,energy,power and collision — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics5.work,energy,power and collision1 Mark
MCQ
The power of water pump is $4 \,kW$. If $g=10 \,ms ^{-2}$, the amount of water it can raise in $1$ minute to a height of $20 \,m$ is ........... $litre$
  • A
    $100$
  • B
    $1000$
  • ✓
    $1200$
  • D
    $2000$
✓

Answer

Correct option: C.
$1200$
c
(c)

Power $=\frac{\text { Work }}{\text { time }}=\frac{m g h}{t}$

$\frac{m(10)(20)}{60}=4000$

$m=1200 \,kg$

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