SOLUTION: A long distance runner left his house running at an average rate of 8 miles per hour. Fifteen minutes (one fourth of an hour) later, his son left his house on his bike traveling o

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Question 470990: A long distance runner left his house running at an average rate of 8 miles per hour. Fifteen minutes (one fourth of an hour) later, his son left his house on his bike traveling on the same route at an average rate of 12 miles per hour. How long will it take the son to catch up with his father?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
8x1/4=2 miles
2 miles +n(8 mph)=n(12 mph)
8n+2=12n
4n=2
n=1/2
It will take 1/2 hour for the son to catch up with his father..