Fluid Mechanics

JEE Main level, single correct, medium

86 of 192

Question 86 of 192

A cylinder of height 20 m20 \mathrm{~m} is completely filled with water. The velocity of efflux of water (in ms−1\mathrm{ms}^{-1} ) through a small hole on the side wall of the cylinder near its bottom is

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Answer: (B) 20

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

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