Answer:the opportunity cost of growing another apple tree is 2 orange trees
Step-by-step explanation:
Opportunity cost represents the value of cost what must be given up toin order to obtain the best alternative.
Here Farmer Brain has 3 acres of land that can support 10 apple threes on each acre, and 30 orange tree on best acre, 20 on good acre and 10 oranges on bad acre.
that means he can grows 30 apples on the 3 acres and 60 oranges at on the 3 acres. giving us
the opportunity cost of growing an orange tree is
60 oranges ( 30+20+10)trees= 30 apples tress
1 orange tree = 30/60
1 orange tree=1/2 apples
therefore the opportunity cost of growing an orange tree is half apple tree, Also the opportunity cost of growing an apple tree is 2 orange trees