Two cyclists, 52 miles apart, begin riding toward each other on a long straight avenue. One cyclist travels 16 miles per hour and the other 10 miles...

Two cyclists, 52 miles apart, begin riding toward each other on a long straight avenue. One cyclist travels 16 miles per hour and the other 10 miles per hour. At the same time, Spot (a greyhound), starting at one cyclist, runs back and forth between the two cyclists as they approach each other. If Spot runs 32 miles per hour and turns around instantly at each cyclist,how far has he runwhen the cyclists meet?