3 years ago

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

2 answers:

8 0

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

Nookie1986 [14]3 years ago

4 0

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

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