Math, asked by shweta2199, 7 months ago

Please answer step by step

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Answered by amitjijain1

1

Step-by-step explanation:

weight of 72 books = 9 kg

weight of 1 book = 72/9 = 8 kg

So, weight of 40 books = 8*40= 320 kg

hence and is 320 kg

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