A conical tank with a bottom opening of cross-sectional area A is filled with water and is mounted on supports as shown in the figure. What is the force F with which plate X must be pushed up to prevent water from leaking ? Assume that the density of air is negligible as compared to the density of water œÅL.$

A conical tank with a bottom opening of cross-sectional area A is fill

1.	A conical tank with a bottom opening of cross-sectional area A is filled with water and is mounted on supports as shown in the figure. What is the force F with which plate X must be pushed up to prevent water from leaking ? Assume that the density of air is negligible as compared to the density of water œÅL.$
A.	œÅL . Vg
B.	œÅL . A.Hg
C.	œÅL . Vg/2
D.	œÅL .Vg/3
Answer» C. œÅL . Vg/2

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