the weight of 72books is 9kg.What is the weight of 40 such books?
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is the weight of 72 books is 9 kg it means that each book weights 8 kg and 40 books will weigh 320 kg
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Answer:
The weight of 72 books = 9kg
The weight of 1 book = 72/9
= 8 g
so, weight of 40 book = 42×8
=356 g
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