AS in the figure shown below, a hole is to be punched out of a plate having a shearing strength of 142 ksi. The compressive stress in the punch is limited to 560 ksi. Compute the maximum thickness of plate from which a hole 7.6 in. in diameter can be punched. If the plate is 51 cm. thick, determine the diameter of the smallest hole that can be punched.

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Pressure and Stress