Question 76

The ratio of present ages of Rahul and his sister is 3 : 4. Before 10 years the ratio of their ages was 13:19. What is Rahul's present age (in years)?

Solution

Assuming, present age of Rahul= x years and his sister= y years.

So, Present ratio= $$x\div y= 3\div4$$ .....(i)

Before 10 years the ratio of their ages

=$$(x-10)\div (y-10)= 13\div19$$ ......(ii)

Solving equation (i) & (ii),

We get, x=36 years and y=48 years.

Therefore, Option A is correct.

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