Question 18164
let the distance between the two cities be x miles

speed of ship = 33 MPH
so time taken by ship = x/33 hours

speed of plane = 605 MPH
so time taken by plane = x/605 hours

according to conditions given

x/33 - x/605 = 104
solving 
(x*605 - x*33)/605*33 = 104
(572*x)/605*33 = 104
(572*x) = 104*605*33
 x = 104*605*33/572
   = 3630 miles

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