Question
The ratio of the present ages of βAβ and βBβ is
8:7, respectively. Four years hence from now, the age of βBβ will be 18 years. If the average of present ages of βAβ, βBβ and βCβ is 22 years, then find the present age of βCβ.Solution
Let the present ages of βAβ and βBβ be 8x years and 7x years, respectively Therefore, 7x + 4 = 18 Or, 7x = 14 Or, x = 2 Sum of present ages of βAβ and βBβ = 8x + 7x = 30 years Sum of present ages of βAβ, 'Bβ and βCβ = 22 Γ 3 = 66 years Therefore, present age of βCβ = 66 β 30 = 36 years
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