The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air)

The inter-cooler pressure, for minimum work required, for a two stage

1.	The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air)
A.	₂ = p₁ × p₃
B.	₂ = p₁/p₃
C.	₂ = p₁ × p₂
D.	₂ = p₃/p₁
Answer» D. ₂ = p₃/p₁