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?

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?

A. 32 years B. 36 years C. 40 years D. 48 years Answer: Option C Explanation: Let the mother's present age be x years. Then, the person's present age = 2 x years. 5 2 x + 8 = 1 (x + 8) 5 2  2(2x + 40) = 5(x + 8)  x = 40.