Answers

2016-02-21T12:14:59+05:30
Lets the rahul's  age be x ..
father is three times .... 3x 
fou years ago ...he was 4 time as rahul =4x 
current age ... =  4x+4=3x
                        = 4x-3x=4
                       = x= 4
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2016-02-21T12:32:28+05:30
Let rahul's age be x ;
his father is three times of his age so let it be 3x 
four years ago his father's age was 4 times as rahul's age 4x
 his present age =  4x+4=3x
                        = 4x-3x=4
                       = x= 4
therfore rahul's present age 4

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