![A self-propelled power reaper with a 1.2 m wide cutter bar was operated at a forward speed of 4 km h-1](https://www.gkseries.com/blog/wp-content/uploads/2023/09/A-self-propelled-power-reaper-with-a-1.2-m-wide-cutter-bar-was-operated-at-a-forward-speed-of-4-km-h-1.jpg)
Q. A self-propelled power reaper with a 1.2 m wide cutter bar was operated at a forward speed of 4 km h-1. Turning loss during operation was observed to be 25 minutes per hectare. Neglecting any other losses, the field efficiency of the reaper will be %.