Question

Mona's father is thrice as old as Mona. After 12 years he will be just twice his daughter. Their present ages are

• A. 18 years, 36 years
• B. 12 years, 24 years
• C. 12 years, 36 years
• D. 10 years, 30 years

Answer 1

The correct option is C

12 years, 36 years

Let Mona's present age be x years.

Her father's present will be 3x years.

After 12 years, Mona's age = (x + 12) years

After 12 years, Mona's father's age = (3x + 12) years

According to the given information,

3x + 12 = 2(x + 12)

3x + 12 = 2x + 24

x = 12

Thus, Mona's present age = 12 years and her father's present age = 36 years