Question

15 years from now ravi's age will be 4 times his present age. Find hi present age

Answer 1

if ravi's age (is considered 0) = 0, today
then, after 15 years from now, he would be = 15 years old
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But, this is not so ....
consider his present age as p 
as per the question , after 15 years " his age will be 4 times his present age" 
then, let's start the equation -

$ρ+15=4p$

Breaking up - solution: then, mathematically - his age will be four ; as it is being multiplied by four. 
So, it solves the case - his age is 4, thatswhy; after 15 years, his age will 4 times 15. 

Answer 2

Answer:

Let ,Ravi's present age be x years

Step-by-step explanation:

According to the question x+15= 4x

=4x-x=15

=3x=15

x=15/3

x =5

Hence, Ravis present age is 5 years