Q168 / 225 · JEE Main 2002 · Physics

A cylinder of height $20 \mathrm{~m}$ is completely filled with water. The velocity of efflux of water (in $\mathrm{ms}^{-1}$ ) through a small hole on the side wall of the cylinder near its bottom is

  • A
    10
  • Correct answer
    B
    20
  • C
    25.5
  • D
    5

Solution

$v=\sqrt{2 g h}=\sqrt{2 \times 10 \times 20}=20 \mathrm{~m} / \mathrm{s}$

Hence, the correct answer is option: 'B'.

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