Total piston displacement is given by the following formula P.D. = stroke in inches, and N is the number of cylinders. Find the diameter if the following are true. L=4.4 in. L4 in., (a) P.D. = 409 cu in., (b) P.D. 393.1 cu in., N = 7 N=4 D2LN, where 4 is the piston displacement in cubic inches, D is the diameter of bore of cylinder, L is the length of

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