Question 103620
John is traveling to a meeting that is 28 miles away. He needs to be there in 30 minutes. How fast does he need to go to make it to the meeting on time?
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distance = 28 miles ; time = (1/2) hour 
EQUATION:
rate = distance/time = 28/(1/2) = 56 mph
He needs to average 56 mph

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Cheers,
Stan H.