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Question

A water tank standing on the floor has two small holes punched in the vertical wall, one above the other. The holes are 2.4 cm and 7.6 cm above the floor. If the jets of water from the holes hit the floor at the same point, then the height of water in the tank is

A
10 cm
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B
5 cm
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C
20 cm
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D
4.8 cm
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Solution

The correct option is A 10 cm
According to question -


Given, range of efflux from both the holes are same.
R1=R2
h1(Hh1)=h2(Hh2) [since R=2h(Hh ]
h1Hh21=h2Hh22
H(h1h2)=h21h22
H=h1+h2
H=2.4+7.6=10 cm

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