Question

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Answer 1

Answer:

Weight of 12 books = 72 kg

Weight of 1 book = 72/12 kg = 6 kg

Weight of 23 books = 6×23 kg = 138 kg

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Answer 2

Answer:

If weight of 12 books = 74kg

Then weight of 1 book=72/12

=> 72/12 = 6

Therefore, weight of 1 book = 6

Weight of 23 books = 23×6

=> 23×6 = 138

Therefore, weight of 23 books = 138kg

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