15. The intercooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p1 = Intake pressure of air, p2 = Intercooler pressure, and p3 = Delivery pressure of air)

p2 = p1 x p3
p2 = p1/p3
p2 = p1 x p3
p2 = p3/p1
✅ The correct answer is option C.

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