SOLUTION: Carlos drove to his cabin on the lake and back. The trip there took four hours and the trip back took 1.6 hours. He averaged 37.5 km/h faster on his return trip than on his outboun

Question 831323: Carlos drove to his cabin on the lake and back. The trip there took four hours and the trip back took 1.6 hours. He averaged 37.5 km/h faster on his return trip than on his outbound trip. Find carlos' average speed on the outbound trip.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let km = the one-way distance he travels
Let km/hr = his speed on the outbound trip
km/hr = his speed on the return trip
----------------------
Equation for outbound trip:
(1)
Equation for return trip:
(2)
-------------------------

The average speed for the outbound trip is 25 km/hr
check:
(1)
(1)
and
(2)
(2)
(2)
(2)
OK

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