At present, the ratio between the ages of Arun and Deepak is 4 : 3. After 6 years, Arun’s age will be 26 years. What is the age of Deepak at present ?

\par Let the present ages of Arun and Deepak be 4x years and 3x years respectively. Then,

4x + 6 = 26

4x = 20

x = 5

\par Deepak's age = 3x = 15 years