The weight of 80 identical books is 400 kg. What is the weight of one such book?

10 kg

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5 kg

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15 kg

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20 kg

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Solution

The correct option is B
5 kg

Weight of 80 identical books = 400 kg
Weight of 1 such book
$= \frac{400}{80} = \frac{10 \times 40}{10 \times 8} = \frac{40}{8} = 5 k g$

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