Question

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
can anyone provide a step by step explanation?​

Answer 1

Answer:

If 108 identical books have a mass of 30 kg, then the mass of 150 such books is 42 kg and the number of such books that have a mass of 20 kg is 71 books.

Step-by-step explanation:

Given: The mass of 108 books 30 kg

Find: (i) the mass of 150 such books,

(ii) the number of such books that have a mass of 20 kg

Step 1: mass of 1 book = 30 ÷ 108 = 0.28 kg

So, the mass of 150 such book = 150 × 0.28 = 42 kg.

Step 2: If mass of 1 book is 0.28 kg then how many books that have a mass of 20 kg.

Number of books = 20÷ 0.28 ≈ 71 books