The weight of 45 books is 9 kg.
What is the weight of 80 books.
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80 books is 16 kg.
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Answer:
Step-by-step explanation:
by unitary method
weight of 45 books = 9kg
weight of one book = 45/9 = 5 kg
there fore weight of 80 books = 80* 5
therefore weight of 80 books = 400 kg
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