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George found that he blinked 85 times in 15 minutes. At this rate, how many SECONDS passed during 51 blinks?
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George found that he blinked 85 times in 15 minutes. At this rate, how many SECONDS passed during 51 blinks?

User Annie Kim
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We know 15 minutes contain 15*60 = 900 seconds, the time for 85 blinks
Then the time for each blink t = 900/85
Time elapsed in seconds for 51 blinks is then 51*t = 900*51/85 = 540 seconds
User Blankabout
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