A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in m/s) through a small hole on the side wall of the cylinder near its bottom is:
Correct answer: B. 20
- A. 10
- B. 20
- C. 25.5
- D. 5
Explanation
The correct answer is Option B:20. The velocity of efflux of water through a small hole near the bottom of a container can be calculated using the formula v = sqrt(2gh), where v is the velocity, g is the acceleration due to gravity (approximately 9.81 m/s^2), and h is the height of the water surface above the hole (20 m in this case). Therefore, v = sqrt(2*9.81*20) = sqrt(392) ≈ 19.80 m/s. This explains why Option B is the correct answer. Options A, C, and D are incorrect as they do not align with the correct calculation based on the given information.
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