Question 251389: Kwan hiked up a hillat 4km/hr and backat 6km/hr. his total hiking time was 3hours. how long did the trip up the hill take him? Answer by solver91311(24713) (Show Source):
Trip down the hill. We can use the same distance because we can assume that the mountain did not grow or shrink noticeably during the hike. And we use for the time because if was the time up the hill and the total trip was 3 hours, then is what is left for going down the hill.
Set these two expressions equal to equal to each other:
Solve this little equation in and you have your answer.
