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I drove in the beach at a rate of 40 miles per hour. If I had driven at a rate of 20 miles per hour instead, then I would have arrived 20 minutes later. How many miles did I drive?

 Feb 16, 2023
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Let the time it took you to drive to the beach ==T

 

40T ==20[T + 20/60], solve for T

 

T ==1/3 of an hour - or 20 minutes

 

1/3  x  40 ==13 + 1/3 miles - that you drove.

 Feb 16, 2023

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