Question

if the weight of 12 sheets of the thick paper is 40 grams, how many sheets of the same paper would weigh 5/2 kilograms

Answer 1

12 sheets weigh 40 g. So, 1 g. means number of sheets :
12/40.
As we know, 1 kg. = 1000 g.
Therefore, 5/2 kg. = 2500 g.

So, now in order to find out how many sheets would weigh 2500 g. we need to :
12/40×2500 = 750

And the correct answer is 750 sheets.

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Answer 2

Given,

The weight of 12 sheets of thick paper is 40 grams.

To find,

The number of sheets of the same paper that would weigh 5/2 Kilograms.

Solution,

We can simply solve this mathematical problem using the following process:

Mathematically, according to the units of conversion:

1 Kilogram (Kg) = 1000 grams (g){Statement-1}

According to the statement-1,

5/2 Kilograms = 5/2 × 1000 grams

= 2500 grams

According to the question, by using the unitary method, we get;

40 grams is the equivalent weight of 12 sheets of the thick paper

=> 1 gram is the equivalent weight of (12/40) sheets of the thick paper

=> 5/2 Kilograms, that is, 2500 grams is the equivalent weight of {(12/40) × 2500 grams}, that is, 750 sheets of thick paper

Hence, 750 sheets of thick paper weigh 5/2 kilograms.