General Aptitude › Ratio and Proportion › Question #4747
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QThe cube of A is inversely proportional to B. If B=3, A=2. If B = 8/9. Determine the value of A.

ID: #4747 Ratio and Proportion 1,213 views
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#4747Q ID
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Ratio and ProportionTopic
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  • A 3 ✔ ✖
  • B 5 ✔ ✖
  • C 6 ✔ ✖
  • D 4 ✔ ✖
Correct Answer

Explanation


As per the question, B is inversely proportional to A3
i.e., B α 1/A3
Or, B =k/ A3
Given that, B=3, A=2
So, 3 = k/ 8, or k=24
Given that, B = 8/9
So, 8/9 = 24/A3
A3 = (9*24)/8 = 27
So, A = 3√ 27 = 3
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