17495. A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is September 13, 2025 by Admin 175.4 r.p.m. 215.5 r.p.m. 241.5 r.p.m. 275.4 r.p.m ✅ The correct answer is option C.