A class sorted 45 books in 90 minutes. How long would it take to sort 120 books?

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15-12-2014
Mathematics

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A class sorted 45 books in 90 minutes. How long would it take to sort 120 books?

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Luanaidn Luanaidn · Answer 1 · 2014-12-15T19:36:58-05:00

Luanaidn Luanaidn

15-12-2014

[tex]45 \ books\ in\ 90\ minutes\\\\ 120\ bookes\ in\ x\ minutes\\\\ making\ proportion\\ 45-90\\120-x\\\\cross\ multiplication\\\\ 45x=90*120\\\\ 45x=10800\ \ \ | divide\ by\ 45\\\\x=240\\\\ It\ will\ take\ 240\ minutes.[/tex]

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Elorox101idn Elorox101idn · Answer 2 · 2014-12-15T19:37:50-05:00

Elorox101idn Elorox101idn

15-12-2014

45 * 2 2/3 = 120
90 * 2 2/3 =240
It would take 240 minutes to sort 120 books

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