1. The difference between the age of the two persons is 6 years.Twelve years ago, the elder was thrice as old as the younger one.The present age of the elder
Answer: 21
Explanation:Lets assume elder present age is x years and younger age is y years.
As per question
x - y = 6 -------------- (1)
twelve years ago
(x-12) = 3 *(y-12)
=> 3y - x = 36-12
=> 3y-x = 24 ------- (2)
By solving the eq (1) and (2)
2y = 30 => y = 15 and x = 21
so elder age is 21 years.
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