Answers

2015-02-01T17:27:54+05:30
Let the age of mona be x
so, father age = y
By the problem 
(I) 3x =y      (Present)
(II) 2(x+12) =  y+12     (After 12 yrs)
so from the above two equation we can get
 x=12 and y=36

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