Question
A persons 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?
Answer: Option C
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Let the mother's present age be x years.
Then, the person's present age = \(\left(\frac{2}{5}x\right) years.\)
Therefore \(\left(\frac{2}{5}x+8\right) = \frac{1}{2}(x+8)\)
2(2x + 40) = 5(x + 8)
x = 40.
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