Posted by Cassie on .
Runner A is initially 7.0 km west of a flagpole and is running with a constant velocity of 6.5 km/h due east. Runner B is initially 8.0 km east of the flagpole and is running with a constant velocity of 7.5 km/h due west. How far are the runners from the flagpole when their paths cross?

Physics 
drwls,
The distance between the runners decreases at a rate of 14.0 km/h. Since they are initially 15 km apart, they meet after 15/14 = 1.0714 hours
Runner B will have run 1.0714*7.5 = 8.0357 miles at that time. He ends up 0.0357 miles (189 feet) west of the flagpole. So does Runner A. 
Physics 
cassie,
Thank you sooo Much !!!:) i truly appreciate it .