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? Choose the correct option:
A) 32 Yrs  B) 36 Yrs  C) 40 Yrs  D) 48 Yrs  E) None
Explanation:   Let the mother's present age be x years.   Then, the person's present age = (2/5)*x years.   ((2/5)*x)+8 = (1/2)(x+8)   2(2x + 40) = 5(x + 8)   x = 40.   Answer: 40 Yrs
<result>C</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?