The age of Somu is one-third his father's. 8 years back he was one-fifth of his father's age. What is his persent age ?  Choices:
A) 11	B) 13	C) 14	D) 16	E) 10
Explanation :   Let Somu's age be x and that of his father be 3x.   So, x - 8 = 3x - 8/5 = x = 16   Answer : Option 16
<result>D</result>
The age of Somu is one-third his father's. 8 years back he was one-fifth of his father's age. What is his persent age ?