Runner A is initially 6.0 km west of a flagpole

Runner A is initially 6.0 km west of a flagpole and is running with a constant velocity of 9.0 km/h due east. Runner B is initially 5.0 km east of the flagpole and is running with a constant velocity of 8.0 km/h due west. What will be the distance of the two runners from the flagpole when their paths cross?
(It is not necessary to convert your answer from kilometers to meters for this problem. You may leave it in kilometers.)