SOLUTION: a motorboat traveled downstream in 1.5 hours with a 3 miles per hour current. ON the way back against the same current the trip took 2 hours. How fast was the boat traveling in s

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Question 820939: a motorboat traveled downstream in 1.5 hours with a 3 miles per hour current. ON the way back against the same current the trip took 2 hours. How fast was the boat traveling in still water?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

a motorboat traveled downstream in 1.5 hours with a 3 miles per hour current.  ON the way back against the same current the trip took 2 hours.

How fastgreen%28r%29 was the boat traveling in still water?

D = rt, Distance Down and Back the same

  %28+r+%2B+%283mph%29%29%281.5hr%29+=+%28r+-+%283mph%29%29%282hr%29 ***

            3.5hr(3mph) = .5r

                  21mph = r

CHECKING our answer***

     24mph(1.5hr) = 36mi =  18mph(2hr) =