Compare the rates of two trains, one travelling at 45 km/hr and other is at 10m/s?  Choose the correct choice from the following choices.
A) 5 : 4	B) 3 : 2	C) 1 : 5	D) 2 : 7	E) 3 : 5

Rationale: "speed of the 1 st train = 45 km / hr speed of the 2 nd train = 10 m / s = 10 * 18 / 5 = 36 km / hr ratio of the speeds of the train = 45 : 36 = 5 : 4 answer is a"
Answer: A