A marathon volunteer hands water bottles to runners, one every 12 seconds. If the race lasts 90 minutes, how many runners served?
Correct answer: B. 450
- A. 400
- B. 450
- C. 500
- D. 600
Explanation
To find out how many runners are served, convert the total race time from minutes to seconds: 90 minutes * 60 seconds/minute = 5400 seconds. The volunteer hands out a bottle every 12 seconds, so divide the total seconds by the distribution rate: 5400 seconds / 12 seconds/bottle = 450 bottles. Therefore, 450 runners are served, making Option B correct. Option A underestimates due to incorrect calculations, Option C overestimates, and Option D assumes an implausible distribution rate.
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