Question
A boy’s age is 150% of what it was 5 years ago, but
75% of what it will be after 8 years. What is his present age?Solution
Let the present age of boy be ‘x’ years. 150% of age of boy 5 years before = 75% of age of boy after 8 years => (150/100) × (x - 5) = (75/100) × (x + 8) => 150(x - 5) = 75(x + 8) => 150x - 750 = 75x + 600 => 75x = 1350 => x = 18 yrs
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