SOLUTION: a long distance runner started at speed of 8mph. 30 minutes later a second runner start the course at 11 mph. how long after the second runner start will he over take the first run

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Question 1200462: a long distance runner started at speed of 8mph. 30 minutes later a second runner start the course at 11 mph. how long after the second runner start will he over take the first runner?
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
Upon start of the second runner, the two are 8%2A%281%2F2%29=4 miles apart.

Approach speed of the second runner to the first runner is 11-8=3 mph.

x, time to close the distance of the 4 miles;
3x=4
x=4%2F3
1 hour 20 minutes