a train running at the speed of 90 km / hr crosses a pole in 12 seconds . find the length of the train ?
"speed = 90 * ( 5 / 18 ) m / sec = 75 / 3 m / sec length of train ( distance ) = speed * time ( 75 / 3 ) * 12 = 300 meter answer : e"
multiply(divide(multiply(90, const_1000), const_3600), 12)