Practice30 Create account

The ratio of the present ages of A and B is 4:5. After 5 years, the ratio of their ages becomes 5:6. Find the present age of A, in years.

Competition practiceRatio, Proportion & Mixtures

A15
B24
C25
D20

Step-by-Step Solution

Let ages be

4 x

and

5 x

. Then

(4 x + 5) / (5 x + 5) = 5/6

gives

24 x + 30 = 25 x + 25

, so

x = 5

. A's age =

4 x = 20

.

Answer: D) 20

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Ratio, Proportion & Mixtures practice questions

More Ratio, Proportion & Mixtures practice

A 50-litre can of buttermilk base holds curd and water in the ratio 4 : 1. How many…20 litres of a mixture contains milk and water in the ratio 5:3. If 4 litres of the…If x : y = 4 : 7 and y : z = 14 : 15, what is x : z in simplest form?Today the ages of Imran and his cousin are in the ratio 4 : 3. In 4 years the ratio will…A 45-litre can of dairy drink mix has curd and water in the ratio 4 : 1. How many litres…