Question

Krishna’s age is twice the sum of Karan and Arjun’s age. If Arjun is 7 years old and Krishna is 40 years old, find the age of Karan.

• A. 11 years
• B. 13 years
• C. 12 years
• D. 14 years

Answer 1

The correct option is B 13 years

Let Karan’s age be x years.
From the information, we can get
Krishna’s age = 2 (Karan’s age + Arjun’s age)
40 = 2 (x + 7)

Solving this equation,
x + 7 = $\frac{40}{2}$ = 20
x = 20 – 7
x = 13

Thus, Karan is 13 years old.