Question
The ratio of age of βPβ 4 years ago to the age of
βQβ 6 years hence from now is 3 : 5. If the sum of their present ages is 54 years, then find the age of βQβ 2 years hence from now.Solution
Let the present ages of βPβ and βQβ be βpβ years and βqβ years respectively. Then, p + q = 54 Or, q = 54 β p ATQ, {(p - 4)}/{(q + 6)} = {3/5} Or, 5(p β 4) = 3(q + 6) Or, 5p β 20 = 3q + 18 Or, 5p β 3q = 38 Or, 5p β 3(54 β p) = 38 Or, 5p β 162 + 3p = 38 Or, 8p = 200 Or, p = 25 Or, q = 54 β 25 = 29 Therefore, age of βQβ 2 years hence from now = 29 + 2 = 31 years
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