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A uniform prims shaped Styrofoan of dens...

A uniform prims shaped Styrofoan of density `rho_(s)` is held completely immersed in water. It lies with its base horizontal. The bottom surface of Styrofoam is at a depth `h_(0)` below water surface and atmospheric pressure is `P_(0)`. Water surface is open to atmosphere. Styrofoam prism is held in equilibrium by a string attached to it symmetrically. Answer the following question for this arrangement `(rho_("water")=rho)`
Net force exerted by water on the styrofoam is

A

`(P_(0)+rhog(h_(0)-sqrt(2)l)Ll`

B

`(P_(0)+rhog(h_(0)-l/(sqrt(2))))Ll`

C

`(P_(0)-rhog(h_(0)-l/(sqrt(2))))Ll`

D

`(P_(0)+rhog(h_(0)-l/(2sqrt(2))))Ll`

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