A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old is the mother at present	Options:
A) 33 B) 37 C) 39 D) 40 E) 82
Explanation:   Let the mother's present age be x years.   Then, the person's present age = years.   2(2x + 40) = 5(x + 8)   x = 40   Answer: 40) 40
<result>D</result>
A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old is the mother at present