Question
A girl’s age is 125% of what it was 10 years ago, but
75% of what it will be after 10 years. What is her present age?Solution
Let the girl's present age be 'x' years. According to question, => 1.25 × (x-10) = 0.75 × (x+10) => 1.25x – 12.5 = 0.75x + 7.5 => 0.5x = 20 => x = 40 years
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