Consider 2 siblings one of them is elder than the other by 20 years . 10 years ago the elder one was twice the age of the younger one . What is the age of elder person ?
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The present age of the elder sibling is 60 years .
Let the age of the younger sibling be x and that of the older sibling be y.
Given that one of the sibling is 20 years older , y = x + 20. -----(1)
20 years ago, the elder sibling was twice the younger sibling .
=> (y-20) = 2(x-20)
=> y = 2x - 40 +20
=> y = 2x - 20 -------(2)
Comparing equation (1) with (2)
2x -20 = x +20
=> x = 40
y = x + 20 = 60
Age of the elder sibling is 60 years and the age of the younger sibling is 40 years.
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