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The mechanical efficiency (ηm) of the engine is given by
ηm = B.P/I.P
ηm = I.P/B.P
ηm = (B.P × I.P)/100
None of these
ηm = B.P/I.P
ηm = I.P/B.P
ηm = (B.P × I.P)/100
None of these