SOLUTION: a bicyclist rode up a mountain at 12 km/h and then back down at 30 km/h. if a round trip takes 3.5 hours, how long did the ride up take?
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Question 332141: a bicyclist rode up a mountain at 12 km/h and then back down at 30 km/h. if a round trip takes 3.5 hours, how long did the ride up take? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = time in hours to go uphill
Then will be the time to go downhill
equation for uphill: km
equation for downhill: km km
Since both equal ,
The trip up took 2.5 hrs
check: km km km
and km km
OK
