Q:
Ten years ago, Kumar was thrice as old as Sailesh was but 10 years hence, he will be only twice as old. Find Kumar’s present age ?
Answer & Explanation
Answer: B) 70 years
Explanation: Let Kumar’s present age be "x" years and Sailesh’s present age be "y" years.
Then, according to the first condition,
x - 10 = 3(y - 10) => x - 3y = - 20 ........(1)
Now, Kumar’s age after 10 years = (x + 10) years.
Sailesh’s age after 10 years = (y + 10) years.
(x + 10) = 2 (y + 10) => x - 2y = 10 ......(2)
Solving (1) and (2),
we get x = 70 and y = 30
Kumar’s present age = 70 years and Sailesh’s present age = 30 years.
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