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13 March, 21:39

132 books are printed in 2 hours, 264 books are printed in 4 hours, and 528 books in 8 hours, how many books are printed in 3 hours, 7 hours, and 15 hours?

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  1. 14 March, 00:26
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    So the unit rate is 66:1

    then you do 66*3=198

    198:3

    then you do the same thing 66*7=462

    462:7

    lastly you do 66*15=990

    990:15
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