5 H.P., 50Hz, 3-phase, 440 V, induction motors are available for the following r

Question - 5 H.P., 50Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest?

Options:

A . 1440 rpm

B . 1000 rpm

C . 2880 rpm

D . 730 rpm

Answer: Option D

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