Question

If the weight of 8 sheets is 40 g how many sheets of the same paper would weight 1.5kg.

Answer 1

use unitary method.
number of sheets in 40 g = 8
number of sheets in 1g = 8/40
number of sheets in 1500g = 8/ 40 × 1500
(1kg = 1000g)
= 300 sheets

Answer 2

given,
weight of 8 sheets is 30 g
to find,
how many sheets of the same paper would weight 1.5 kg

Now,
weight of 1 sheet = 40/ 8 = 5 gram
then ,
sheets of same weight would weight 1.5 kg = 1500/5 = 300.

Therefore,
weight of 300 sheet would be 1.5 kg.