Question

The ratio of father's age and son's age is 8:3. If the sum of their ages is 55 years, how old is the son ?

Answer 1

Let age of father be 8X years.

So, son age = 3x years.

Sum of their ages = 55
8x + 3x = 55
11x = 55
X = 55/11 = 5

age of father = 8*5 = 40 years
age of son = 3*5 = 15 years

Answer 2

Ratio=8:3
Sum=55
Let. Father's age=8x
Son's age=3x
8x+3x=55
11x=55
x=55/11=5
3x=15