awaybrant awaybrant

16-10-2017
Mathematics

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George found that he blinked and 85 times in 15 minutes. At this rate how many seconds past during 51 blinks

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citricblueberry citricblueberry

16-10-2017

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

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