Question

X is 36 years old and y is 16 years. In how many years will X be twice as old as Y?

Answer 1

next 4 years


16 plus 4 is equal to 20 x
36 plus 4 is equal to 40 y


now 20 into 2 is equal to 40




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Answer 2

The answer is after 4 years.

Here is solution.
Given, age of X = 36
Age of Y = 16
Let the year after which X's age is twice than y's age be a.

Then after a year age of X = 36+a.
And age of Y = 16+ a

As per given condition
36+a = 2 (16+a)
36 + a = 32 +2a
36-32 = 2a - a
4 = a

Therefore answer = 4 years.
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