The sum of present age of P and Q is 48 years. Today Q is 4 years older than R . The respective ratio of present age of P and R is 4 : 7. What is Q's age two year hence ( in years ) ?

34

It is given that - 

 P + Q= 48 

 Q = R + 4                                    

Then,

P +R = 44

ratio of →            P   :    R

                          4   :     7

Let  age of P = 4x

      age of R = 7x

As,    11x = 44 

          1x = 4 

 age of R = 7x 

             = 7 × 4 = 28

  Q = 28 + 4 = 32  

  Q age two year hence = 32 + 2 = 34 years