Problema Solution
The distance between two cities is one hundred miles, and a woman drives from one city to the other at a rate of fifty mph. At what rate must she return if the total travel time is three hours and forty minutes?
Answer provided by our tutors
Time taken to go from one city to other = 100/50 = 2 hours
time left for the return journey = 1 hour 40 mins = 5/3 hrs
Speed = Distance / time = 100 / (5/3) = 60 mph