Question

An acre of land produces $100$ bananas and zero apples, or $200$ apples and zero bananas. Find marginal opportunity cost of bananas and apples.

Answer 1

Marginal opportunity cost of bananas $=\frac{△\text{loss of apples}}{△\text{gain of bananas}}=\frac{200}{100}=2$.
Marginal opportunity cost of apples $=\frac{△\text{loss of bananas}}{△\text{gain of apples}}=\frac{100}{200}=0.5$.