Question 443913
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Hi
train travels 20 miles faster than a car.
Let x and (x+20) represent speed of car and train respectively
Question states***  Note: D = r*t OR t= D/r
{{{ 90/x = 120/(x+20)}}}  |Cross Multiplying for solving
  120c = 90(x+20)
   30x = 180
     x = 60mph, speed of car.  The  speed pf the train is 80mph  (60mph+20mph)

CHECKING our Answer***
 90/60 = 120/80 = 3/2




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