Question
The current average age of X, Y and Z is 35 years. Three
times the current age of Y is 60 more than twice the current age of X. If the age of Z after 10 years will be 25% more than his present age, find the present age of X.Solution
ATQ,
Present age of Z = 10 / 0.25 = 40 years
Let present ages of X and Y be x and y, respectively.
So, x + y = 35 × 3 – 40 = 65 ………………(1)
And, 3y – 2x = 60 ………………(2)
Equation (1) × 3 – Equation (2), we get
3x + 3y – 3y + 2x = 65 × 3 – 60
Or, 5x = 135
Or, x = 27
So, present age of X = 27 years
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