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## Homework Statement

The L-shaped tank shown in Fig. 14-33 is filled with water and is open at the top. If d = 3.24 m, what is the force due to the water (a) on face A and (b) on face B?

IMAGE: http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c14/fig14_33.gif

## Homework Equations

i know that F=PA (where P is pressure and A is surface area)

P-Pi= ρgh (where ρ is desnity and Pi is initial atmospheric pressure)

## The Attempt at a Solution

Other than those formulas, i don't know what else i need. But i can't see how i have enough information to use those formulas. I don't know how i would calculate initial atmospheric pressure or desnity without them being given.