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Assuming that what is meant is what fraction or percentage of an hour is 20 seconds, then there is 60 seconds in a minute and 60 minutes in an hour so therefore there is 60 x 60 seconds on an hour. 20 seconds divided by 360 seconds gives 1/18th or 0.05556 05 5.56% of an hour.

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โˆ™ 2009-09-23 21:52:00
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Q: 20 seconds is how many hour?
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