a train running at the speed of 120 km / hr crosses a pole in 12 seconds . what is the length of the train ?
"speed = ( 120 * 5 / 18 ) m / sec = ( 100 / 3 ) m / sec length of the train = ( speed x time ) = ( 100 / 3 * 12 ) m = 400 m . answer : e"
multiply(divide(multiply(120, const_1000), const_3600), 12)