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Q. Figure shows two holes in a wide tank containing a liquid common. The water streams coming out of these holes strike the ground at the same point. What is the height of liquid column in the tank?
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Mechanical Properties of Fluids

Solution:

Range $R = 2\sqrt{h\left(H -h\right)}$
$R_{1} = R_{2} \Rightarrow 2\sqrt{h_{1}\left(H -h_{1}\right)} = 2\sqrt{h_{2}\left(H -h_{2}\right)}$
$4\left(H -4\right)= 6\left(H -6\right)$
or $2H =36 -16 =20$ or $H =10\, cm$