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Posted by on Thursday, October 15, 2009 at 7:12pm.

a motorist travels at 80 km/hr for 3 hours and 2 more hours at 100 km/hr. what is the average speed for the whole trip?

  • physics - , Thursday, October 15, 2009 at 7:23pm

    figure the distance on each leg, then add.
    average speed=totaldistance/totaltime

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