Example 7
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Exercise
1A
BASIC LEVEL
1. 108 identical books have a mass of 30 kg. Find
(i) the mass of 150 such books,
(ii) the number of such books that have a mass
of 20 kg
Answers
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Explanation:
Step-by-step explanation:
Mass of 108 identical books = 30 kg. Mass of 1 book = 30/108 = 5/18 kg. Mass of 150 books = 150×5/18 kg =125/3 kg = 41.66 kg. No of books that have mass 20 kg = 72 books because 1 kg is 3.6 books.
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