tough slice of bread · Physics Brawl 2016 #FoL.2

Physics · mechanics

Problem

A square wheat field covers an area of 16 ha. A harvesting company owns a combine harvester whose reel is 8 m wide. The combine moves with velocity 5 km·h⁻¹ and it consumes 10 litres of fuel per kilometer when harvesting. The company buys the fuel for 28.40 CZK per litre. How much will harvesting the whole field cost the company (rounded to integer CZK), if they have to pay the combine driver 85 CZK for each started hour of work? Neglect any delays of the combine due to turning or fires in the field. Meggy was harvesting part-time.

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