SOLUTION: the distance between two cities in ninety miles, and a women drives from one city to the other at a rate of 45mph. At what rate must she return if the total travel time is three h

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Question 316003: the distance between two cities in ninety miles, and a women drives from one city to the other at a rate of 45mph. At what rate must she return if the total travel time is three hours and forty minutes?
Found 2 solutions by rfer, Alan3354:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
90/3.66=24.5 mph

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
the distance between two cities in ninety miles, and a women drives from one city to the other at a rate of 45mph. At what rate must she return if the total travel time is three hours and forty minutes?
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The trip there took 2 hours (90/45).
She has 1hr 40 mins to get back
d = rt
90 = r*(100/60)
r = 5400/100 = 54 mph