Posted by **nick** on Tuesday, February 12, 2013 at 6:21pm.

Runner A crosses the starting line of a marathon and runs at an average pace of 5.6 miles per hour. Half an hour later, Runner B crosses the starting line and runs at an average rate of 6.4 miles per hour. If the length of the marathon is 26.2 miles, which runner will finish ahead of the other? Explain.

(A-)Runner B; Runner B will catch up to Runner A 4 hours after Runner A crosses the starting line.

(B-)Runner B; Runner B will catch up to runner A 3.5 hours after Runner A crosses the starting line.

(C-)Runner B; Runner B will pass Runner A and finish more than half an hour ahead of Runner A.

(D-)Runner A; Runner B will not be able to catch Runner A in the time it takes Runner A to complete the 26.2 mile course.

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