a train running at the speed of 52 km / hr crosses a pole in 9 seconds . find the length of the train ?
"speed = 52 * ( 5 / 18 ) m / sec = 130 / 9 m / sec length of train ( distance ) = speed * time ( 130 / 9 ) * 9 = 130 meter answer : a"
multiply(divide(multiply(52, const_1000), const_3600), 9)