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A tank with a small hole at the bottom has been filled with water and kerosene (specific gravity 0.8) . The height of water is 3 m and that of kerosene 2 m . When the hole is opened the velocity of fluid coming out from it is nearly : (take $\;g=10\;ms^{-2}\;$ and density of water =$\;10^{3}\;kg\;m^{-3}\;$)

$(a)\;10.7\;ms^{-1} \qquad(b)\;9.6\;ms^{-1}\qquad(c)\;8.5\;ms^{-1}\qquad(d)\;7.6\;ms^{-1}$

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