Question

Sachin is younger than rahul by 4 years.of their ages are ratio of 7:9 then how old is sachin

Answer 1

sachin =7x
rahul=9x
9x-7x=2x
2x=4
x=2
so sachin 7×2=14 yrs

Answer 2

Answer:

Let Rahul age be x years.

Then, Sachin age will be (x - 4) years.

According to Question now,

x - 4/x = 7/9

9(x - 4) = 7(x)

9x - 36 = 7x

9x - 7x = 36

2x = 36

x = 36/2

x = 18 years

Therefore,age of sachin will be 18 - 4 = 14 years.