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4 September, 22:39

Mary drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 8 hours. When Mary drove home, there was no traffic and the trip only took 6 hours. If her average rate was 16 miles per hour faster on the trip home, how far away does Mary live from the mountains?

Do not do any rounding.

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  1. 4 September, 22:41
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    Speed = Distance : time

    Distance : 6 - Distance : 8 = 16

    (8D - 6D) : 48 = 16

    2D = 16 x 48

    2D = 768

    D = 384 miles
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