Dances runs around a track in sixty seconds. Wolves, running in the opposite direction around the track, meets Dances every twenty seconds. How long does it take for Wolves to run around the track?

-Problem modified from UNL Math Day

This one is easy. Wolves goes 2/3 and Dances 1/3 every time they meet. They meet three times, so Wolves went 2 laps and dances, 1. So it takes Wolves 30 seconds to do a lap.

Posted by Lawrence on 2003-08-26 23:03:02