Question

In ratio amd proportion cost of 10 pencils is equal to 5 pens.What is the ratio of the cost of pen to pencil?

Answer 1

let the cost of each pencil be rs 1
10 ✏ = rs 10
cost of 5 pen = rs 10
1 pen = rs 2
ratio = 2:1

Answer 2

let x be the cost of a pencil and y be the cost of a pen.

then, 10x = 5y

$\frac{x}{y} = \frac{5}{10} \\ = \frac{1}{2}$