2006 AMC 12B Problems/Problem 5
Problem
John is walking east at a speed of 3 miles per hour, while Bob is also walking east, but at a speed of 5 miles per hour. If Bob is now 1 mile west of John, how many minutes will it take for Bob to catch up to John?
Solution
The speed that Bob is catching up to John is 
miles per hour. Since Bob is one mile behind John, it will take 
of an hour to catch up to John.
