According to the fan and pump affinity laws, if a centrifugal pump's rotational speed is reduced from 1,800 rpm to 1,440 rpm using a VFD, the shaft power consumption will change by approximately what factor?
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A
Power reduces to 80% of original
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B
Power reduces to 64% of original
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C
Power reduces to 51.2% of original
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D
Power reduces to 40% of original