Question

31. An electric motor operates with an
efficiency of 90%. A pump
operated by the motor has an
efficiency of 80%. The overall
efficiency of the system is
1) 85% 2) 100% 3) 72% 4) 60%​

Answer 1

Answer:

3)72%

Explanation:

Efficiency = (Efficiency of motor) × (Efficiency of pump)

Efficiency  =0.9×0.8×100% =72%

Answer 2

Answer:

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