A pressure gauge is attached to the bottom of a closed

A pressure gauge is attached to the bottom of a closed tank filled with water, the reading of which is pm. Determine the pressure of the air above the free surface of the liquid, if the heights h1 and h2 are known, find the tensile Frast and the shear F cut off forces of the bolts securing the conical cap with dimensions d and l to the vertical wall of the tank. Cover weight m.
Given: pm = 0.8 at = 78,480 Pa; h1 = 1.4m; h2 = 2.5m; d = 0.85m; l = 0.65m; rat = 98100 Pa; m = 30kg
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