Question 435782
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Hi
Let x and c represent the speed of the boat and current respectively
Question states***
  x + c =  48mph  |r = D/t = 48mi/1hr
  x - c =  32mph  |r = 48mi/1.5hr
   2x = 80mph
    x = 40mph, speed of boat.  The current is 8mph (48mph-40mph)