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April 20, 2014

Homework Help: physics

Posted by Anonymous on Tuesday, September 13, 2011 at 7:32am.

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 85.0 km/h, 12.0 min at 95 km/h, and 35.0 min at 30.0 km/h, and spends 35.0 min eating lunch and buying gas. Determine the average speed for the trip?
34.9+12.8+50.4+18.8=116.9/60=19.483hrs
distance
76.5+96.7+37.7=210.9
210.9km/1.1083hrs=190.2914km/h ??????
done it so many times am so confuse!!!

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