Answer:
7 days
Step-by-step explanation:
First let's start with the wheat. If you know that there is 75 acres of wheat, and you can harvest 12 acres in one day, all you have to do is 75 divided by 12.
This would get you at 6.25, but a whole day would be 7.
Corn, you know that there is 62.5 acres. Same thing, you do 62.5/10, and will get you around 7 again.