SOLUTION: Julie and Eric row their boat( at a constant speed) 45 miles downstream for 5 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 9 hours

Question 167202: Julie and Eric row their boat( at a constant speed) 45 miles downstream for 5 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 9 hours. Find the rate of the current.
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
d=r*t in this instance where rate downstream and rate upstream rate of the boat is the rate of the current

we know that ---->
: ---->

multiply top by 9 and bottom by 5 to eliminate the terms

so
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