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7 July, 13:37

Predict the time needed to deliver 72 papers at a rate of 9 papers in 18 min

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  1. 7 July, 14:04
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    Notice that the number of minutes is double the number of papers. So, 72 papers will take 72*2=144 minutes to deliver. 144 minutes = 2 hours and 24 minutes.
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