Sachin ki aayu rahul ki aayu se 4 varsh kam hai , yadi dono ki aayu ka anupat kramsh 7:9 hai to vartman me sachin ki aayu kya hogi.
Let the age of sachin be 'x'
Now since rahul is greater than sachin by 4 years then the age of rahul will be x+4
Now the ratio of their ages is 7:9
=x/(x+4)=7/9
= 9x = 7(x+4)
= 9x=7x+28
=9x -7x =28
=x= 28/2=14
Therefore the age of sachin is 14