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    Lhezkie's Avatar
    Lhezkie Posts: 1, Reputation: 1
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    #1

    Jul 16, 2014, 10:56 PM
    30.0min at 80km/h, 12.0m at 100km/h , 45.0m at 40km/h
    A person travels from one city to another with different constant speeds between pair of cities. She drives 30.0min at 80km/h, 12.0min at 100.0km/h and 45.0min at 40km/h and spend 15 min eating lunch and buying gas. Question. A.Determine the average speed for the trip. B. Determine the distance between the initial and final cities
    AntC's Avatar
    AntC Posts: 184, Reputation: 19
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    #2

    Jul 17, 2014, 06:48 AM
    90km/102 mins/60 min/hr=52.94118km/hr
    Distance = 90km (0.5 hr x 80km/hr+0.2hr x 100km/hr + 0.75hr x 40km/hr)
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