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-   -   30.0min at 80km/h, 12.0m at 100km/h , 45.0m at 40km/h (https://www.askmehelpdesk.com/showthread.php?t=796893)

  • Jul 16, 2014, 10:56 PM
    Lhezkie
    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
  • Jul 17, 2014, 06:48 AM
    AntC
    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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