Quantity A - Speed of train X = 7420​ = 60 km / hr Speed of train Y = (53​) × 60 = 36 km / hr Relative speed (both are travelling in opposite direction) = 60 + 36 = 96 Distance travelled in 3 hours = 96 × 3 = 288 km However, the trains are already 100 km apart and are travelling towards each other. Distance between trains will be = 288 - 100 = 188 km Quantity B - Speed of Bus = 12300​ = 25 m / s Speed in km / hr = 25 × (518​) = 90 km / hr Distance travelled in 2 hour = 90 × 2 = 180 km Hence, Quantity A > Quantity B.