SOLUTION: Kwan hiked up a hill at 4 km/hr and back down at 6 km/hr. His total hiking time was 3 hrs. How long did the trip up the hill take him?
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Question 456829: Kwan hiked up a hill at 4 km/hr and back down at 6 km/hr. His total hiking time was 3 hrs. How long did the trip up the hill take him?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
4x=6y
x+y=3
4x+4y=12
6y+4y=12
10y=12
y=12/10
x=18/10
The trip up the hill took 1.8 hours. The trip downhill took 1.2 hours..
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