SOLUTION: A boat travels 140 miles going upstream and takes 10 hours. Then travels the same distance downstream in 5 hours. A What is the speed of the boat? B. What is the speed of the cu

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Question 675996: A boat travels 140 miles going upstream and takes 10 hours. Then travels the same distance downstream in 5 hours.
A What is the speed of the boat?
B. What is the speed of the current?
It's been over 50 years since I took algebra
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

 D = rt    0r  r = D/t

 r - c  = 14  140mi%2F10hr

 r + c =  28  140mi%2F5hr

  2r = 42

   r = 21mph  and c = 7mph   21-c+=+14