a train running at the speed of 60 km / hr crosses a pole in 12 sec . what is the length of the train ?
"speed = 60 * 5 / 18 = 50 / 3 m / sec length of the train = speed * time = 50 / 3 * 12 = 200 m answer : a"
multiply(divide(multiply(60, const_1000), const_3600), 12)