Let the present ages of ' Samir and Tanuja be 8x and 15x years respectively. According to the question After 9 years 15x+98x+9​ = 1811​ ⇒ 165x+99 = 144x+ 162 ⇒ 165x-144x= 162-99 ⇒ 21x= 63 ⇒ x = 2163​ = 3 ∴ Samir’s present age = 8x= 24 years Tanuj’s present age = 15x= 45 years ∴ Required difference = 45 - 24 = 21 years