The cost for a 200-horsepower pump with a VFD controller is $42,000. The cost estimate of a similar pump of 300 horsepower capacity, provided the exponent in the cost-capacity equation is 0.64, is closest to: (choose one)
(a) $47,240
(b) $48,520
(c) $53,780
(d) $54,440
C2 = 42,000(300/200)^0.64
= $54,444
Answer is (d) $54,440
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