Introduction : Ratio and proportion

SAMPLE PROBLEMS

1. Salaries of Ravi and Sumit are in the ratio 2 : 3. If the salary of each is increased by Rs. 4000, the new ratio becomes 40 : 57. What is Sumit’s salary?

a. Rs 17,000
b. Rs  20,000
c. Rs  25,500
d. Rs  38000

2. Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is:

a. 2 : 5
b. 3 : 5
c. 4 : 5
d. 6 : 7

3. A gardener wants to plant trees in his garden in rows in such a way that the number of trees in each row to be the same. If there are 24 rows the number of trees in each row is 42. If there are 12 more rows find the number of trees in each row?

a. 24 trees
b. 28 trees
c. 32 trees
d. 35 trees

4. Two number are in the ratio 3 : 5. If 9 is subtracted from each, the new numbers a

a. 27
b. 33
c. 49
d. 55

5. 6 years ago, the ratio of the ages of Kunal and Sagar was 6:5. 4 years hence, the ratio of their ages will be 11:10. What is Sagar’s age at present?

a. 12 years
b. 14 years
c. 16 years
d. 18 years

Answers—  1.D   2.C  3.B    4.B   5.C