The sum of the present ages of a woman and her daughter is 45 years. When the woman attains her husband’s present age, the ratio of the ages of her husband and her daughter will be 2 : 1. Find the present age (in years) of her daughter.
Explanation:
Let the present ages of the woman, her husband and her daughter be w years, h years and d years respectively.
w + d = 40 …(1)
The woman would attain her husband's age after (h - w) years.
∴ (h + h - w)/(d + h - w) = 2
w = 2d …(2)
From (1) and (2), d = 15
Hence, option (b).
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