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Posted by **alya** on Saturday, February 19, 2011 at 11:40am.

1. Linda travels by car around one city to another with different constant speeds between pairs of cities. She travels for 35 min at 84 km/h, 17 min at 105 km/h and 50 min at 42 km/h and spends 25.0 min eating lunch and buying gas

a) Determine the average speed for the trip

b) Calculate the distance between the initial and final cities along the route

- fizik -
**drwls**, Saturday, February 19, 2011 at 12:29pmTotal time spent driving or at stops:

= T = 35 + 17 + 50 + 25 = 127 minutes

(b) Total distance travelled:

= D = 84*(35/60) + 105*(17/60) + 42*(50/60) = 49 + 29.75 + 35 = 113.75 km

(a) Average speed = 113.75/127 = 0.89567 km/s = 53.74 km/h

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