Answers

2014-06-27T15:47:39+05:30
Let the present age of rahul be 5x
and the present age haroon be 7x
fter 4 years, their ages will be 5x+4 and 7x+4
also (5x+4)+(7x+4)=56
therefore 12x+8=56
therefore 12x=56-8
12x=48
x=48/12
thereforex=4
since x=4,
                5x=5*4=20
          and 7x=7*4=28
therfore their present ages are 20 and 28.                                        (Ans.)
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2014-06-27T15:49:16+05:30
Let the common multiple be x.
Therefore, present age of rahul is 5x and present age of haroon is 7x.
After 4 years'
age of rahul will become=(5x+4);
age of haroon will become=(7x+4);
According to the question;
(5x+4)+(7x+4)=56
therefore,
5x+4+7x+4=56
12x+8=56
12x=56-8
12x=48
x=48/12
x=4
therefore present age of rahul is=5x=5*4=20years.
and present age of haroon is =7x=7*4=28 years.
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