Question 1163678
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The statement of the problem is deficient; the statement that they both run clockwise doesn't tell us anything.<br>
If, at the start, Jerry is 100 meters "behind" Kenny on the 400 meter track, then he has to make up 100 meters to catch up; but if he is already 100 meters "ahead" of Kenny, then he has to make up 300 meters to catch up.<br>
Re-post the problem, making the problem clear.<br>