a train running at the speed of 54 km / hr crosses a pole in 9 seconds . find the length of the train ?
"speed = 54 * ( 5 / 18 ) m / sec = 15 m / sec length of train ( distance ) = speed * time ( 15 ) * 9 = 135 meter answer : c"
multiply(divide(multiply(54, const_1000), const_3600), 9)