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After 15 years Mohan's age will be four times his present age. Find the present age.
Given :
15 years later Mohan's age is four times the present age.
To do :
We have to find the present age of Mohan.
Solution :
Let the present age of Mohan be x years.
This implies,
Age of Mohan after 15 years $=$ 4x
$x+15 = 4x$
$4x-x=15$
$3x=15$
$x=\frac{15}{3}$
$x=5$
The present age of Mohan is 5 years.
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