Home › CMA Foundation › businessmathematics › Ratios and Proportions › The duplicate ratio of a:b is:
The duplicate ratio of a:b is:
Aa²:b²
Ba:b
C√a:√b
Da³:b³
Answer & Solution
Correct answer: A. a²:b²
1. Per OCR: "the duplicate ratio of a:b is a:b × a:b = a²:b²."
2. Compound two equal ratios.
3. For 2:3, duplicate is 4:9.
_Source: ICMAI BoS CMA Foundation Paper 3 (FBMS) — Paper3_07042026.pdf, Module 1 §1.1_