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3 September, 20:19

Two school buses leave the same school at the same time, but are headed in opposite directions. One bus traveled 45 miles per hour and the other bus traveled 40 miles per hour.

How long until the buses are 170 miles apart?

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Answers (2)
  1. 3 September, 20:27
    0
    2 hours

    Step-by-step explanation:

    45x + 40x = 170

    85x = 170

    x = 2
  2. 3 September, 23:57
    0
    40 mph: 4 hours 15 minutes

    45 mph: 3 hours 46 minutes 40 seconds

    Step-by-step explanation:

    The rate of separation = 45 + 40 = 85 mph

    speed = distance / time

    85 = 170 / t

    t = 170/85 hour
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