Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m³ here, V =πN.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)

• A. 3.6 V.W. ρ
• B. 3.6 V.W.Dr.ρ
• C. 3.6 V.W.Dr/ρ
• D. 3.6 W.Dr.ρ

Answer: (B)