Answers

2014-12-20T19:08:24+05:30
Ram's present age = 3 years
Ravi's present age = 10 years 
therefore sum of their ages next year = (3+1)=(10+1) = 4+11= 15 years
ANS= (A) 15

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this is not the algebraic way of doing the exercise.
Sir the question was objective type and the boy only needed answer if you want i will edit it and give whole solution and plzz check my answer on largest english word
2014-12-20T22:29:43+05:30

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Ram's age = R
Ravi's age = V

R + 7 = V

R + 4 = 1/2 ( V + 4 )          =>        2 R + 8 = V + 4    => V = 2 R + 4

Hence  R + 7 = V = 2 R + 4 
         R = 3 years      and hence  V = 10 years
     Next year ,  R + 1 + V + 1  =  15 years


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