SOLUTION: a race boat covers a distance of 60 km downstream in one and a half hour. it covers this distance upstream in 2 hours. the speed of the race boat in still water is 35 km/hr. find t

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Question 825017: a race boat covers a distance of 60 km downstream in one and a half hour. it covers this distance upstream in 2 hours. the speed of the race boat in still water is 35 km/hr. find the speed of the stream.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
a race boat covers a distance of 60 km downstream in one and a half hour.
it covers this distance upstream in 2 hours.
the speed of the race boat in still water is 35 km/hr. find the speed of the stream.
:
Let c = speed of the current
Write a time equation; time = dist/speed
60%2F%28%28c%2B35%29%29 = 1.5
60 = 1.5(c+35)
60 = 1.5c + 52.5
60 - 52.5 = 1.5c
7.5 = 1.5c
c = 7.5/1.5
c = 5 km/hr is the rate of the current
:
:
Check it in the upstream trip
60%2F%28%2835-5%29%29 = 2