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.
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Answer:
Number of Books = 108
Weight of 108 books = 30 Kg
Weight of 1 book = 277 Grams
Number of Books in 1 Kg = 3.6 Books
1. Mass of 150 such books = 150 X 277 Grams
= 41,550 Grams / 1000
= 41.550 Kg
2. Total Number of books in 20 Kg = 20 X 3.6
= 72
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