Question 607422
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Hi
Note:  D = rt OR d/r = t
John Averaged 50 MPH going and 55mph returning.  total trip took 32hr 
 d/50 + d/55 = 32
 55d + 50d = 32(50·55)
  105d = 32(50·55)
     d = 32(50·55)/105
     d = 838.1mi