Question

If the weight of 12 sheets of paper is 40 grams, then how many sheets of paper will be present in a paper bundle of 5 kg?

Answer 1

Let x be the number of sheets in the paper bundle of 5 kg.

Weight (in g)	Sheets of paper
40	12
5000	x

Sheets of paper and it's weight are in direct variation.
So, using arrow method:
$\frac{5000}{40}=\frac{x}{12}$
On cross multiplication,
$x=\frac{5000}{40}\times 12=1500$
So, the number of sheets in the paper bundle is 1500.