Pls help me solve this problem asap

Dear Student

As per the question: 
Let Anita's age be 6x and Sachin's age be 7x

Four years hence:
Anita's age would be (6x+1)+4= 6x+5
Sachin's age would be (7x+1)+4 = 7x+5

Now, it is given that: 
(6x+5)/(7x+5) = 7/8
Or, 48x + 40 = 49x + 35
x=5

So, Sachin's current age would be 7x+1 = 35+1 = 36 years

Regards