type 2 age based ratio & proportion problems Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

The ratio of present age of two brothers is 1 : 2 and 5 years back the ratio was 1 : 3. What will be the ratio of their age after 5 years ?

a) 3 : 5

b) 5 : 6

c) 2 : 3

d) 1 : 4

Question : 2

The average age of boys in the class is twice the number of girls in the class. The ratio of boys and girls in the class of 50 is 4 : 1. The total of the ages (in years) of the boys in the class is

a) 800

b) 400

c) 2500

d) 2000

Question : 3

The ratio of the age of a father to that of his son is 5: 2. If the product of their ages in years is 1000, then the father's age (in years) after 10 years will be :

a) 80

b) 100

c) 60

d) 50

Question : 4

Harsha is 40 years old and Ritu is 60 years old. How many years ago was the ratio of their ages 3:5?

a) 37 years

b) 5 years

c) 20 years

d) 10 years