"4 years ago, the ratio of ½ of A’s age at that  time and four times of B’s age at th
Channel: Doubtnut
Date: 2020-04-12

"4 years ago, the ratio of ½ of A’s age at that
  time and four times of B’s age at the time was 5:12. Eight years hence ½ of
  A’s age at that time will be less than B’s age at that time by 2 years. What
  is B’s present age 
a. 5 years               b. 8 years      c. 10 years
d. 12 years              e. 14 years"