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total distance is 4 miles
relative speed is 5 miles
total time required = 4/5 hrs = 48 mins
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As both are walking towards each other combined relative rate/speed of walking would be 3MPH + 2MPH = 5MPH. Distance given is 4Miles
Time taken = Distance/Speed = 4/5 Hrs = 4/5*60 minutes = 48 minutes.
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Bunuel
Jennifer and Alice are 4 miles apart. If Jennifer starts walking toward Alice at 3 miles per hour and at the same time Alice starts walking toward Jennifer at 2 miles per hour, how much time will pass before they meet?

(A) 20 minutes
(B) 28 minutes
(C) 43 minutes
(D) 48 minutes
(E) 60 minutes

We can let the time traveled by Jennifer and Alice = t.

Since Jennifer is traveling at a rate of 3 mph, her distance is 3t, and since Alice is walking at a rate of 2 mph, her distance is 2t.

Let’s now determine t:

Jennifer’s distance + Alice’s distance = total distance

3t + 2t = 4

5t = 4

t = ⅘ hour = 48 minutes.

Answer: D
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