Posted by **Christina** on Friday, October 26, 2012 at 7:13pm.

Ann and Bob are cycling on a track. Ann completes one lap every 15 seconds, and Bob completes one lap every 18 seconds. When will Ann lap Bob, assuming that they started together?

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**Anonymous**, Sunday, April 13, 2014 at 6:59pm
60

- math -
**Anonymous**, Tuesday, December 15, 2015 at 3:44pm
90 seconds

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