a train running at the speed of 48 km / hr crosses a pole in 9 seconds . find the length of the train ?
"speed = 48 * ( 5 / 18 ) m / sec = 40 / 3 m / sec length of train ( distance ) = speed * time ( 40 / 3 ) * 9 = 120 meter answer : a"
multiply(divide(multiply(48, const_1000), const_3600), 9)