When 300 workers are employed, the first 200 workers produce 12.5m each while the next 100 workers produce 11m each.

The average product of labour when the number of workers is 400 is 10 metres.

As the number of workers is increased from 100 to 500, the average product of labour falls by 20%.

The production function exhibits diminishing average product of labour at all levels of labour input.