Monu is 16 years elder than Rahul. Monu's age is 70% of the sum of his and Rahul's age. What will be Monu's age after 8 years ?

36

70%= \(\frac{7}{10}\)

      Monu : Rahul  :  Sum    :  Difference

         7    :     3     :    10     :        4

                                                    ↓ x4

                                                  16 (given) 

⇒ 1R  = 4

Monu's age after 9 years = 7 × 4 + 8 = 36 years