Train A took 30 minute to cover a distance of 50 km.If the speed of train B is 40% faster than train A, then the ratio of the respective speed of the both train is:
Distance = 50 km
Time taken = 30 min = $$\dfrac{1}{2}$$ hour
Then, Speed of train A = $$\dfrac{50}{(\dfrac{1}{2})} = 100$$ km/hr
Speed of train B = 140% of 100 = 140 km/hr
Required ratio = 100 : 140 = 5 : 7.
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