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प्रश्न
The weight of 72 books is 9 kg. What is the weight of 40 such books?
उत्तर
Weight of 72 books = 9 kg
Weight of 1 book = `9/72 = 1/8` kg
Therefore, weight of 40 books = `1/8 xx 40` = 5 kg
Thus, the weight of 40 such books is 5 kg.
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