Raju is 42 years younger than Kamal. Raju's age is 35% of the sum of his and Kamal's age. What will be Kamal's age after 3 years ?

94

35%= \(\frac{7}{20}\)

      Raju : Kamal      :   Sum    :  Difference

         7    :     13     :    20     :        6

                                                    ↓ x7

                                                  42 (given) 

⇒ 1R  = 7

Kamal's age at present = 13 × 7 = 91 years

Kamal's age after 3 years = 91 + 3 = 94 years