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The sub-duplicate ratio of a:b is:
Aa : b
B√a : √b
Ca²:b²
D³√a : ³√b
Answer & Solution
Correct answer: B. √a : √b
1. Per OCR: "√a:√b is the Sub Duplicate ratio of a:b."
2. Take square root of each term.
3. Sub-triplicate = ³√a : ³√b.
_Source: ICMAI BoS CMA Foundation Paper 3 (FBMS) — Paper3_07042026.pdf, Module 1 §1.1_