To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

[A].	(1.2)3/2
[B].	(1.2)3/5
[C].	(1.2)2/3
[D].	(1.2)5/3

Answer: Option D

Explanation:

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To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

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