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The sub-triplicate ratio of 8 : 27 is
A2 : 3
B24 : 81
C4 : 9
D27 : 8
Answer & Solution
Correct answer: A. 2 : 3
1. The sub-triplicate ratio of a : b is cuberoot(a) : cuberoot(b).
2. cuberoot(8) = 2 and cuberoot(27) = 3.
3. So the sub-triplicate ratio of 8 : 27 is 2 : 3.
4. Option B is the inverse, option C is a factored form, both wrong.
_Source: ICAI BoS Foundation Paper 3, Ch 1 Unit I 'Ratio', p.5 Ex.1(A) Q8_
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