SOLUTION: A cyclist leaves a checkpoint and travels at an average of 14mph. A second cyclist leaves one half hour later and averages 18 mph. How long does it take the second cyclist to overt

Question 737266: A cyclist leaves a checkpoint and travels at an average of 14mph. A second cyclist leaves one half hour later and averages 18 mph. How long does it take the second cyclist to overtake the first? Use only one unknown.
Thanks!!!!!!!
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A cyclist leaves a checkpoint and travels at an average of 14mph. A second cyclist leaves one half hour later and averages 18 mph. How long does it take the second cyclist to overtake the first?
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In 1/2 an hour the 1st cyclist is 7 miles away (14*0.5)
The 2nd cyclist gains on him at 4 mi/hr (18-14)
d = r*t
t = d/r = 7/4
t = 1.75 hours

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