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The weight of 72 books is 9 kg. What is the weight of 40 such books?

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The weight of 72 books is 9 kg. What is the weight of 40 such books?

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Weight of 72 books = 9 kg

Weight of 1 book = 9/72 = 1/8kg

Therefore, weight of 40 books = 1/8 x 40 = 5kg

Thus, the weight of 40, Such books is 5 kg

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