Answers

2015-05-18T13:33:34+05:30
Let the age of son be x the the age of dad will be 7x.
After 10 years he will be three times as old as his son
that is  7x+10= 3(x+10)
    7x+10= 3x + 30
     7x-3x= 30 - 10
 4x = 20
x = 5
So, age of son is 5 years and age of father is 35 years

0
2015-05-18T15:28:38+05:30
Let s be age of son
d=7*s
with increase in years i.e,10 even the son's increases
d+10=3(s+10) 
d=7s
7s+10=3s+30
7s-3s=20
4s=20
s=5
d=7s
d=7*5
d=35


0