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प्रश्न
The weight of 65 books is 13 kg.
(i) What is the weight of 80 such books?
(ii) How many such books weigh 6.4 kg?
उत्तर
Weight of 65 books = 13 kg
(i) Weight of 1 book = `13/65` kg
Weight of 80 books = 80 × `13/65=1040/65` = 16 kg
(ii) Number of books weighing 13 kg = 65
Number of books weighing 1 kg = `65/13` = 5
Number of books weighing 6.4 kg = 6.4 × 5 = 32
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