SOLUTION: Mary and Janet are running in the Apple Hill Run. Mary runs at 7mph, Janet at 5 mph. If they start at the same time, how long will it be before they are 1.5 miles apart?

Question 638001: Mary and Janet are running in the Apple Hill Run. Mary runs at 7mph, Janet at 5 mph. If they start at the same time, how long will it be before they are 1.5 miles apart?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Mary and Janet are running in the Apple Hill Run. Mary runs at 7mph, Janet at 5 mph. If they start at the same time, how long will it be before they are 1.5 miles apart?
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Mary DATA:
rate = 7 mph ; time = t hrs. ; distance = 7t miles
-----
Janet DATA:
rate = 5 mph ; time = t hrs. ; distance = 5t miles
-----
Equation:
7t-5t = 1.5 hrs
2t = 1.5 hrs
time = (3/4)hr = 45 minutes
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Cheers,
Stan H.
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