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 id the mother at present?
32 years
36 years
40 years
48 years
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) $\Rightarrow$ x = 40
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) $\Rightarrow$ x = 40