Question

If in a stick of chalk, Carbon is 3 g, what is the weight of the chalk stick?

Answer 1

Quantity of Carbon in chalk stick = 3 g Let the weight of chalk be x g.

Then, 12% of x = 3

Hence the weight of chalk stick is 25 g.

Answer 2

Let weight of the stick be x gm.

 12% of x=3

(12/100)*x=3

x=3*(100/12)=25 gm