A boy’s age is 140% of what it was 5 years ago, but 65% of what it will be after 10 years. What is his present age?
Let the present age of boy be ‘x’ years. 140% of age of boy 5 years before = 65% of age of boy after 10 years = > (140/100)×(x - 5) = (65/100)×(x + 10) = > 140(x - 5) = 65(x + 10) = > 140x - 700 = 65x + 650 = > 75x = 1350 = > x = 18 yrs
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