104. A turbo-charged, 16 cylinder, Vee-type diesel engine has an air consumption of 3,000 kg/hr

per cylinder at rated load and speed. This air is drawn in through a filter by a centrifugal

compressor directly connected to the exhaust gas turbine. The temperature of the air from the compressor is 135°C and a counter flow air cooler reduces the air temperature to 45°C before it

goes to the engine suction header. Cooling water enters the air cooler at 30°C and leaves at

40°C. Calculate the log mean temperature difference.

A. 47.23°C B. 87.82°C C. 43.34°C D. 65.24°C