18503. The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is September 14, 2025 by Admin [A]. 24.8 r.p.m. [B]. 48.2 r.p.m [C]. 82.4 r.p.m. [D]. 248 r.p.m ✅ The correct answer is option C.
