Answer:
Poland has comparative advantage in producing coal , so they will produce 250 tons of coal.
Step-by-step explanation:
Here for understanding which product should Poland specialize in according to its comparative advantage depends up on the opportunity cost for producing for 1 ton coal . According to the question both Poland and Czech republic can produce a bushel of wheat in 1 hour but the difference comes in the production of coal where Poland takes 4 hour to make 1 ton of coal and Czech republic takes 6 hours to make 1 ton of coal, so from this statement we can take out what is the opportunity cost for producing 1 ton of coal for both countries.
FOR POLAND
Opportunity cost of producing 1 ton of coal = 4 bushes
FOR CZECH REPUBLIC
Opportunity cost of producing 1 ton of coal = 6 bushes
So it is clear that for Poland the opportunity cost for producing 1 ton of coal is less, so they should specialize in producing coal and in 1000 hours they can produce 250 tons of coal.