a train running at the speed of 80 km / hr crosses a pole in 9 sec . what is the length of the train ?
"speed = 80 * 5 / 18 = 200 / 9 m / sec length of the train = speed * time = 200 / 9 * 9 = 200 m answer : e"
multiply(divide(multiply(80, const_1000), const_3600), 9)