Alan and Brigitte are beginning a bike race. Alan begins riding at 12 miles per hour,...

  • Thread starter Thread starter Donald L
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Donald L

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...and ten minutes later...? Alan and Brigitte are beginning a bike race. Alan begins riding at 12 miles per hour, and ten minutes later Brigitte begins riding at 15 miles per hour. How many minutes will it take her to catch up to Alan?
 
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