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M: +1.00/-0.33

At the point of operation with maximum efficiency, a turbine indicated unit power of 12 units and unit speed of 98 units and operates with 3300 kgf/s of flow. What is the speed in rpm and the specific speed of the machine respectively when its design head is 8.5m?

[ESE (IES) CE 2016 P2]
A
B
C
D