A medium transmission line delivers 80 MW at 132 kV with sending end voltage 135 kV. If the line losses are 1.5 MW, find the efficiency of the transmission line.

An engine running at 150 rpm drives a dynamo through a belt and pulley system. The diameter of the engine pulley is 100 cm and the diameter of the dynamo pulley is 10 cm. Neglecting slip, find the rotational speed of the dynamo.

A flat belt drive runs at a linear speed of 12 m/s. If the tension on the tight side is 900 N and the tension on the slack side is 600 N, calculate the power transmitted by the belt.