a train running at the speed of 90 km / hr crosses a pole in 9 sec . what is the length of the train ?
"speed = 90 * 5 / 18 = 25 m / sec length of the train = speed * time = 25 * 9 = 225 m answer : b"
multiply(divide(multiply(90, const_1000), const_3600), 9)