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Let, the present age of 'Q' be '4x' years So, present age of 'P' = {(4x X 0.75) + 4} = (3x + 4) years And, present age of 'R' = {(25 + 9) X 2} - 4x = (68 - 4x) years According to question; 3x + 4 + 4x + 68 - 4x = (30 X 3) + 3 Or, 3x + 72 = 90 + 3 Or, 3x = 93 - 72 Or, 3x = 21 x = 7 So, present age of 'R' = {68 - (4 × 7)} = (68 - 28) = 40 years
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