Question
What is A's present age, if after 20 years his age will
be 8 times his age 15 years back?Solution
Let A's present age be x. A's age 20 years ago = (x - 20) A's age after 15 years = (x + 15) According to question, =>(x + 20) = 8 (x – 15) => x + 20 = 8x – 120 => 7x = 140 => x = 20 years
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