Question

If the weight of 12 sheets.of thick paper is 40 grams,then how many sheets of the same paper will weight 2 1/2kg's

Answer 1

Here is your Answer!!

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the weight of 12 sheets= 40g
so
the weight of 1 sheet= 40/12 = 10/3

Now

21/2Kg convert into gram

(21/2)×1000 =21000/2 = 10500g

=
$\frac{10500}{ \frac{10}{3} } = \frac{10500 \times 3}{10 } \\ = 1050 \times 3 \\ = 3150 \: sheets \: \: ans$