Q.

The velocity ratio of a differential wheel and axle with 'D' as the diameter of effort wheel and d1 and d2 as the diameters of larger and smaller axles respectively, is

• AD/(d₁ + d₂)
• BD/(d₁ - d₂)
• C2D/(d₁ + d₂)
• D2D/(d₁ - d₂)