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

Q. 8.     The weight of 72 books is $9\; kg.$ What is the weight of 40 such books?

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Given,

The weight of 72 books = 9 kg

So, The weight of 1 book :

$=\frac{9}{72}=\frac{1}{8}kg$

And hence,

The weight of 40 such books:

$=40\times\frac{1}{8}=5kg$

Hence, the weight of 40 books will be 5 kg.

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