The mechanical efficiency ($${\eta _{\text{m}}}$$) of the engine is given by

A. $${\eta _{\text{m}}} = \frac{{{\text{B}}{\text{.P}}{\text{.}}}}{{{\text{I}}{\text{.P}}{\text{.}}}}$$

B. $${\eta _{\text{m}}} = \frac{{{\text{I}}{\text{.P}}{\text{.}}}}{{{\text{B}}{\text{.P}}{\text{.}}}}$$

C. $${\eta _{\text{m}}} = \frac{{{\text{B}}{\text{.P}}{\text{.}} \times {\text{I}}{\text{.P}}{\text{.}}}}{{100}}$$

D. None of these

Answer: Option A

Solution(By Examveda Team)

The mechanical efficiency ($${\eta _{\text{m}}}$$) of the engine is given by $${\eta _{\text{m}}} = \frac{{{\text{B}}{\text{.P}}{\text{.}}}}{{{\text{I}}{\text{.P}}{\text{.}}}}$$