compare the rates of two trains , one travelling at 45 km / hr and other is at 10 m / s ?
"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"
divide(45, multiply(divide(10, const_1000), const_3600))