Need Help In Physics Problem Solving

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A person travels by car from one city to another. She drives for 26.5 min at 88.4 km/h, 12.3 min at 97.4 km/h, 52.5 min at 33.5 km/h, and spends 15.7 min along the way eating lunch and buying gas.The distance between the cities along the route is 88.322 km

Jun 8th, 2015

Thank you for the opportunity to help you with your question!

26.5 min=(26.5/60)hrs=53/120 hrs at 88.4km/h: the distance covered is 88.4*(53/120)= 39.04km

12.3min=(12.3/60)hrs=41/200 hrs at 97.4km/h: the distance covered is 97.4*(41/200)=19.967km

52.5min=(52.5/60)hrs=7/8 hrs at 33.5km/h: the distance covered is 29.3125km

the total distance= 29.3125km+19.967km+39.04km

total distance= 88.3195km

=88.32 km

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 8th, 2015

The second half of the question was missing:

Determine the average speed for the trip. Answer in units of km/h.

Jun 8th, 2015

okay, the total distance is 88.322km, and toatal time covered is 26.5+12.3+52.5+15.7=107 minute

average speed=88.322km/(107/60)minutes

average speed=88.322km/1.78333333hrs

= 49.5264km/h

Jun 8th, 2015

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