SOLUTION: nicks boat can travel 36 miles upstream in the same time that it can travel 54 miles downstream. the speed of the current is 3 mph, find the speed of nicks boat without the curren

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Question 170712: nicks boat can travel 36 miles upstream in the same time that it can travel 54 miles downstream. the speed of the current is 3 mph, find the speed of nicks boat without the current.
thanks!
Answer by checkley77(12569) About Me  (Show Source):
You can put this solution on YOUR website!
36/(S-3)=54/(S+3)
54(S-3)=36(S+3)
54S-162=36S+108
54S-36S=108+162
18S=270
S=270/18
S=15 MPH IS THE SPEED OF THE BOAT IN STILL WATER.
PROOF:
36/(15-3)=54/(15+3)
36/12=54/18
3=3