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Two runners start running at the same time from the start/finish line of a 400 meter oval track. One runner run laps of 1 minute 15 seconds and the other runs laps of 1 minute 45 seconds. How long will it be before the runners cross the start/finish line at the same time?

 Feb 23, 2021
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How many laps are the runners supposed to be running?

 Feb 23, 2021

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