Question

A pile of 104 copies of the book weighs 78 kg . How many books weigh 30 kg?

Answer 1

Hii..

Here is ur answer :--

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Number of books weighs 78kg = 104

Number of books weighs 1kg = 104/78

Number of books weighs 30kg = 104/78*30

= 40

Hope it helps!!

Answer 2

Given,

A pile of 104 copies of the book weighs 78 kg.

To Find,

How many books weigh 30 kg =?

Solution,

We can solve the question as follows:

It is given that a pile of 104 copies of the book weighs 78 kg.

Number of books that weigh 78 kg = 104

Now, the number of books that will weigh 1 kg,

Number of books that weigh 1 kg  = $\frac{104}{78}$

Now,

The number of books that will weigh 30 kg = weight of 1 kg * 30

                                                                         $= \frac{104}{78} *30$

                                                                          $= 40$ copies

Hence, 40 copies of the book will weigh 30 kg.