Question

Rahul is 5 years old. His father's age is 31 years. After how many years will his father's age be 3 times of his age.

Answer 1

Answer:

After 8 years.

Step-by-step explanation:

Well:

At age of 5 of Rahul his father is 31.

After 8 years old Rahul will be 13 years of age and his father will 39 years of age which is 3 times rahul age which is 13.

Answer 2

Answer:

8 years

Step-by-step explanation:

Let us consider Rahul's age as x.

Then the equation formed from the given information is:-

31 + x = 3 (5+x)

31+x = 15+3x

31-15 = 3x-x

16 = 2x

x = 16/2

x = 8