If the pump head is 75 m, discharge is 0.464 m³ /s

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If the pump head is 75 m, discharge is 0.464 m³ /s and the motor speed is 1440 rpm at rated condition, the specific-speed of the pump is about

1. 4
2. 26
3. 38
4. 1440

Correct Option: C

Specific speed, N_s =	N√Q
	H^3/4

=	1440 × √0.464
	75^3/4

= 38