Six Years Ago, The Ratio Of The Ages Of Khalid And Sadaf Was 6 : 5. Four Years Hence, The Ratio Of Their Ages Will Be 11 : 10. What Is Sadaf’s Age At Present?

Question: Six Years Ago, The Ratio Of The Ages Of Khalid And Sadaf Was 6 : 5. Four Years Hence, The Ratio Of Their Ages Will Be 11 : 10. What Is Sadaf’s Age At Present?
a. 16 years
b. 20 years
c. 22 years
d. 25 years