SOLUTION: Jane and Mary are 12 miles apart hiking toward each other. How long will it take them to meet if Jane walks at 3mph and Mary walks 1 mph faster than Jane?

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Question 440018: Jane and Mary are 12 miles apart hiking toward each other. How long will it take them to meet if Jane walks at 3mph and Mary walks 1 mph faster than Jane?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let t = time for them to meet
given:
Jane's rate: +3+ mi/hr
Mary's rate: +4+ mi/hr
They are 12 miles apart
You can think of one hiker as standing still and the other
approaching at the sum of their rates
+12+=+%283+%2B+4%29%2At+
+t+=+12%2F7+
+t+=+1.714+ hrs
+.714%2A60+=+43+ min
They will meet in 1 hr and 43 min