Answers

2016-04-11T19:39:23+05:30
5 years ago

let age of son be x
then age of father is 2x

now 
son's age is x+5 
father's age is 2x+5
 given,
 sum of the age is 70 
 so,  x+5+2x+5 =70 
           3x=60 
            x=20 
            son's age is 25
            father's age is 45 
               
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2016-04-12T07:56:18+05:30
Let the age of the son 5 years ago is x
       the age of his father 5 years ago is y
Given,
5 years ago,
2x = y 
Present age of the son is x+5
Present age of the son is y+5    = 2x+5
At present, 
x+5+y+5 = 70
x+2x+10 = 70
3x = 60
x= 20

y = 2x
y = 2(20)
y = 40

Present age of son = x+5 = 25
Present age of son = 2x+5 =45

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