"Ten years ago, a man was seven times as old as his son. Two years hence, twice his sage
Channel: Doubtnut
Date: 2020-04-05

"Ten years ago, a man was seven times as old as his
 son. Two years hence, twice his sage will be equal to five times the age of
 his son. What is the present age of the son?
a. 12 years b. 13 years c. 14 years d. 15years"