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25 June, 20:33

The weight of 72 books is 9kg. what will be the weight of 40 such books?

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  1. 25 June, 20:56
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    Answer: 5kg

    Step-by-step explanation:

    If 72 books weigh 9kg

    Then, 1 book weighs 9/72 = 1/8 kg

    Therefore, 40 books will weigh

    40 times 1/8 = 5kg
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