Hans can do 4 loads of laundry and type 6 pages per hour. Heidi can do 12 loads of laundry and type 8 pages per hour. Heidi's opportunity cost of doing one load of laundry is _____

Question

Quizplus · Accepted Answer

To find Heidi's opportunity cost of doing one load of laundry, we need to calculate how many pages she could have typed in the time it takes her to do one load of laundry. 
Heidi can do 12 loads of laundry in the same amount of time it takes Hans to do 4 loads, meaning she is three times more productive at laundry than Hans. 
Therefore, while Hans does his 4 loads, Heidi can do 3 loads and spend the remaining time typing. In that time, she can type 3 x 6 = 18 pages. 
So, Heidi's opportunity cost of one load of laundry is equal to typing 18/12 = 3/2 pages, or 1.5 pages. 
Therefore, the answer is (D).

Hans Can Do 4 Loads of Laundry and Type 6