a train running at the speed of 36 km / hr crosses a pole in 9 seconds . what is the length of the train ?
"speed = 36 x 5 / 18 m / sec = 30 / 3 m / sec . length of the train = ( speed x time ) . length of the train = 30 / 3 x 9 m = 90 m . answer : d"
multiply(divide(multiply(36, const_1000), const_3600), 9)