- A9 : 125
- B18 : 125
- C18 : 25
- D36 : 125
Step-by-Step Solution
Duplicate of 4 : 5 = 16 : 25; triplicate of 1 : 2 = 1 : 8; sub-duplicate of 81 : 25 = 9 : 5. Compounding multiplies the terms: .
Answer: B) 18 : 125
The ratio compounded of the duplicate ratio of 4 : 5, the triplicate ratio of 1 : 2 and the sub-duplicate ratio of 81 : 25 is:
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