Alice and Bob race around a running track. Alice runs at a constant rate of one lap every 5 minutes and Bob runs at a constant rate of one lap every 6 minutes. If they both start at the same time, how many minutes will it take for Alice to get exactly one lap ahead of Bob?	Choices.
A) 30  B) 32  C) 35  D) 36  E) 40
Let x be the number of minutes it takes for Alice to get one lap ahead.   Then Alice ran x/5 laps and Bob ran x/6 laps.   x/5 = 1+x/6   6x=30+5x   x=30   The answer is 30.
<result>A</result>
Alice and Bob race around a running track. Alice runs at a constant rate of one lap every 5 minutes and Bob runs at a constant rate of one lap every 6 minutes. If they both start at the same time, how many minutes will it take for Alice to get exactly one lap ahead of Bob?