Question

The mass of 160 books is 19kg.How many such books will weight 38kg?​

Answer 1

Answer:

Using Unitary Method here,

We have given,

The mass of 160 books is 19 kg.

19 kg of mass is of 160 books .

1 kg mass is of 160 / 19 books

If one kg is weight of 160 / 19 books. So we have to multiply it by 38 .

➝ 38 is mass of = 38 × 160/ 19

➝ 2 × 160

➝ 320

320 books weight will weight 38 kg.

Step-by-step explanation:

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Answer 2

Answer:

Hence 320 such books weight 38kg.

Step-by-step explanation:

In the above question, the given details are as below,

Given that The mass of 160 books is 19kg.  

How many such books will weight 38kg?

We have to know the weight of one book as follow,

Weight of 160 book upon number of books.

$=\frac{19}{160}$

So, the number of books that will weight 38 kg is as follow,

$=\frac{38}{\frac{19}{160} } \\=\frac{38\times 160}{19}\\=\frac{6080}{19}\\= 320$