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11 April, 16:53

Bob is taking his son to look at colleges. The first college they plan to visit is 150 miles from their home. In the first hour they drive at a rate of 60 mph. If they want to reach their destination in 2 1/2 hours. what speed must they average for the remainder of their trip?

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  1. 11 April, 17:19
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    Let's find the remaining distance they must travel.

    Total distance-distance covered

    150-60=90 mi

    Now, we need to find the average speed they need to travel per hour to reach the destination in 2.5 (2 1/2) hours.

    90 mi/2.5 h=36 mi/h

    They must travel at an average speed of 36mph to reach their destination in 2 1/2 hours.

    Check:

    60+36 (2.5)

    =120 mi
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