Water falls down a $500.0 \,m$ shaft to reach a turbine which generates electricity. ................ $m^3$ water must fall per second in order to generate $1.00 \times 10^9 \,W$ of power ? (Assume $50 \%$ efficiency of conversion and $\left.g=10 \,ms ^{-2}\right)$

  • [KVPY 2016]
  • A

    $250$

  • B

    $400$

  • C

    $500$

  • D

    $200$

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