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
Simple way is dances speed takes it 60 s
Dances + Wolves takes it 20 s which means combined speed is thrice hence wolves speed is twice dances hence time taken by wolves is 30 min
Posted by salil
on 2006-03-02 11:36:51