Question

Q 8 - If 100 year is equal to the sum of the ages o
f father and son. 2:1
was the ratio of father and son before the period of 5 years. Find out
the ratio of ages which would be after the period 10 year.
A-3:4
B - 3:5
C-4:3
D-5:3​

Answer 1

after the 10years the ratio of ages of father and son is 5:3

Answer 2

Answer:

Ratio of their ages after 10 years is 5:3.

So option D is correct answer.

Step-by-step explanation:

Let before 5 year age of father be 2x and age of son be x

So, present age of father is 2x+5 and present age of son is x+5

Now giveb sum of their age is 100

So according to question

$(2x + 5) + (x + 5) = 100 \\ 3x + 10 = 100 \\ 3x = 100 - 10 \\ 3x = 90 \\ x = 90 \div 3 \\ x = 30$

Now after 10 years age of father is (2x30+5)+10=65+10=75

And after 10 years age of son is (30+5)+10=45

Ratio of their ages after 10 years = 75:45=5:3