Answer:
94.2 inches square is the capacity.
Explanation:
Given : A cylindrical jelly jar is 5 inches across the top and 12 inches high.
To find : How much jelly can it hold?
Solution :
A cylindrical jelly jar is 5 inches across the top.
i.e. the diameter of the cylinder is d=5 inches.
Radius of the cylinder is

The height of the cylinder is h=12 inches.
The volume of the cylinder is



Therefore, 94.2 inches square is the capacity.