Two persons are to run a race, but one can run 11 meters per second, whereas the other can run 5 meters per second. If the slower runner has a 69-meter head start, how long will it be before the faster runner catches the slower runner, if they begin at the same time?
?
Give your answer to one decimal place, if required.
?
__________ sec
Fill in the blank(s) with the appropriate word(s).
11.5
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= 
? x
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