SOLUTION: On a sales trip, Gail drives the 600 miles to Richmond averaging a certain speed. The return trip is made at an average speed that is 10 mph slower. Total time for the round trip i

Question 192618: On a sales trip, Gail drives the 600 miles to Richmond averaging a certain speed. The return trip is made at an average speed that is 10 mph slower. Total time for the round trip is 22 hours. Find Gail's average speed on each part of the trip.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = her average speed on the trip to Richmond
Let = time to get to Richmond
Let = time for return trip
given:
mi is the one-way distance
hr
-------------------

and

There are 2 equations with 2 unknowns, so it's solvable

and, since ,

mi/hr
mi/hr
the trip to Richmond was made at 60 mi/hr
The trip back at 50 mi/hr
check answer

OK
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