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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

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