Question

2. The weight of 72 books is 9 kg. What is the weight of 40 such book​

Answer 1

Answer:

5kg

Step-by-step explanation:

weight of 72 books = 9kg =) weight of 1 book = 9/72 kg =) weight of 40 such books = 9/72 * 40 kg = 5kg

Answer 2

Answer:

Weight of 72 books = 9 Kg

So, weight of 1 book = 9/72 kg = 0.125 Kg

Hence, weight of 40 books = 0.125*40 kg = 5 Kg