RS Aggarwal Class 7 Chapter 8 Exercise 8A Solution

In this section of maths solutions of RS Aggarwal Class 7 Chapter 8 Exercise 8A Solution, the students get solution of all questions.

1: Express each of the following ratios in simplest form:

9: Divide Rs. 5600 between A, B and C in the ratio 1 : 3 : 4.

10: What number must be added to each term of the ratio 9 : 16 to make the ratio 2 : 3?

11: What number must be subtracted from each term of the ratio 17 : 33 so that the ratio become 7 : 15?

12: Two numbers are in the ratio 7 : 11. If 7 is added to each of the numbers, the ratio becomes 2 : 3. Find the numbers.

13: Two numbers are in the ratio 5 : 9. On subtracting 3 from each, the ratio becomes 1 : 2. Find the numbers.

14: Two numbers are in the ratio 3 : 4. If their LCM is 180, find the numbers.

15: The ages of A and B are in the ratio 8 : 3. Six years hence, their ages will be in ratio 9 : 4. Find their present ages.

16: The ratio of copper and zinc in an alloy is 9 : 5, If the weight of copper in the alloy is 48.6 grams, find the weight of zinc in the alloy.

17: The ratio of boys and girls in a school is 8 : 3. If the total number of girls be 375. Find the number of boys in the school.

18: The ratio of monthly income to the savings of a family is 11: 2. If the savings be Rs. 2500, find the income and expenditure.

19: A bag contains Rs. 750 in the form of rupee. 50 P and 25 P coins in the ratio 5 : 8 : 4. Find number of coins of each type.

23: Two numbers are in the ratio 5 : 7, If the sum of the numbers is 720, find the numbers.

24: Which ratio is greater?
(i) (5 : 6) or (7 : 9)
(ii) (2 : 3) or (4 : 7)
(iii) (1:2) or (4 : 7)
(iv) (3 : 5) or (8 : 13)

25: Arrange the following ratios in ascending order:

(i) ( 5 : 6), (8 : 9), (11 : 18)

(ii) (11: 14), (17: 21), (5: 7) and (2 : 3)