If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Dia. of L.P. cylinder, and D₂ = Dia. of H.P. cylinder)

• A. D₁/D₂ = p₁ p₂
• B. None of these
• C. D₁/D₂ = p₁/p₂
• D. D₁/D₂ = p₂/p₁

Answer: (D)