At present the ratio between the ages of Arun and Deepak is 2:5. After 10 years Arun's age will be 30 years. What is the age of the Deepak?
Choose the correct choice from the following answers
A) 20	B) 40	C) 50	D) 60	E) 45

Rationale: "let the present age of arun and deepak be 4 x and 3 x 2 x + 10 = 30 2 x = 20 x = 10 deepak ' s age = 5 x = 50 years answer is c"
Answer: C