Question

the weight of 84 identical book is 12 kg what is the weight of 45 such books​

Answer 1

Answer:

6.4286kg

Step-by-step explanation:

weight of 84 identical books = 12kg
weight of 1 book = 12/84 = 1/7 kg
weight of 45 books = (1/7)*45 = 45/7 kg = 6.4286kg.



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Answer 2

Given,

The weight of 84 identical books is 12 kg.

To Find,

The weight of 45 such books.

Solution,

The weight of 84 identical books is given

So,

Weight of 84 books = 12 kg

Weight of 1 Book = 12/84 = 1/7 kg

Now,

Weight of 45 books = 1/7*45

                                  = 6.42 kg

Hence, the weight of 45 such books is 6.42 kgs.