SOLUTION: Russ and Janet are running in Apple Hill Fun Run. Russ runs at 7 mph, Janet at 5 mph. If they start at the same time, how long will it be before they are 1/2 mile apart?
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Question 656340: Russ and Janet are running in Apple Hill Fun Run. Russ runs at 7 mph, Janet at 5 mph. If they start at the same time, how long will it be before they are 1/2 mile apart? Answer by checkley79(3341) (Show Source):
You can put this solution on YOUR website! D=RT
.5=7T-5T
.5=2T
T=.5/2
T=.25 HOURS OR 15 MINUTES THEY ARE 1/2 MILE APART.
PROOF:
.5=7*.25-5*.25
.5=1.75-1.25
.5=.5
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