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If water is ejecting from a hole of radi...

If water is ejecting from a hole of radius r at a depth h from the water surface in cylindrical vessel of diameter D, then speed with which the water level in the vessel drops .(Consider area of hole is comparable to area of vessel)

A

`(4r^2)/D^2sqrt(2gh)`

B

`(4r)/Dsqrt(2gh)`

C

`((4r^2)sqrt(2gh))/sqrt(D^4-16r^4)`

D

`((4r)sqrt(2gh))/sqrt(D^3-4r^2)`

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