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2. Fractions and Decimals
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Q67 of 125 Page 38

How manykg boxes of chocolates can be made withkg chocolates?

Weight of each box = kg

Total weight of chocolates = kg


Number of boxes of chocolates that can be made



As we know, when dividing one fraction by another fraction, we multiply the first fraction by the reciprocal of the other.



⇒ 3 × 8 = 24 boxes


∴ 24 chocolate boxes can be made.


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Health: The directions for a pain reliever recommend that an adult of 60 kg and over take 4 tablets every 4 hours as needed, and an adult who weighs between 40 and 50 kg take onlytablets every4 hours as needed. Each tablet weighsgram.

a) If a 72 kg adult takes 4 tablets, how many grams of pain relievers he or she receiving?


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66

Animals: The label on a bottle of pet vitamins lists dosage guidelines. What dosage would you give to each of these animals?

a) A 18 kg adult dog


b) A 6kg cat


c) A 18 kg pregnant dog

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Anvi is making bookmarker like the one shown in Fig. 2.6. How many bookmarker can she make from a 15 m long ribbon?

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A rule for finding the approximate length of diagonal of a square is to multiply the length of a side of the square by 1.414. Find the length of the diagonal when :

a) The length of a side of the square is 8.3 cm.


b) The length of a side of the square is exactly 7.875 cm.

Questions · 125
2. Fractions and Decimals
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