Course: CA Foundation; Topic: Ratio
Learning Objective:
How to find compound ratio?
Concept:
The duplicate ratio of a : b is a² : b²
Exercise 1A, Question 5, CA Foundaton Study Material
Question: The duplicate ratio of 3 : 4 is …?
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐀) : √3 : 2
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐁) : 4 : 3
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐂) : 9 : 16
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐃) : None of these
Solution Video:
Exercise 1A, Question 9, CA Foundaton Study Material
Question: The ratio compounded of 4 : 9 and the duplicate ratio of 3 : 4 is …?
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐀) : 1 : 4
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐁) : 1 : 3
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐂) : 3 : 1
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐃) : None of these
Solution Video:
Exercise 1A, Question 10, CA Foundaton Study Material
Question: The ratio compounded of 4 : 9, the duplicate ratio of 3 : 4, the triplicate ratio of 2 : 3 and 9 : 7 is …?
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐀) : 2 : 7
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐁) : 7 : 2
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐂) : 2 : 21
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐃) : None of these
Solution Video:
Exercise 1A, Question 11, CA Foundaton Study Material
Question: The ratio compounded of duplicate ratio of 4 : 5, triplicate ratio of 1 : 3, sub duplicate ratio of 81 : 256 and ….
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐀) : 4 : 512
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐁) : 3 : 32
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐂) : 1 : 12
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐃) : None of these
Solution Video:
Exercise 1A, Question 21, CA Foundaton Study Material
Question: If 2s : 3t is the duplicate ratio of 2s – p : 3t – p then …?
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐀) : p² = 6st
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐁) : p = 6st
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐂) : 2p = 3st
𝐎𝐩𝐭𝐢𝐨𝐧 (𝐃) : None of these