A single cylinder four stroke engine operating at 80% of mechanical efficiency develops a brake power of 60 kW. The indicated power and the power lost due to friction respectively are 

1
40 kW and 15 kW
2
75 kW and 20 kW
3
40 kW and 20 kW
4
75 kW and 15 kW
5
Question Not Attempted

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