geometry questions. see below

1. a triangular pyramid has a volume of 10 inches cubed and a height of 5 inches.  what would be the volume of the figure if it had the same base (triangle) but was a prism and not a pyramid?

2. a triangular pyramid has a volume of 10 inches cubed and a height of 5 inches.  what would be the volume of the pyramid if it had a rectangular base?

3.  If the volume of a cylinder is 314 cubic inches, and the height is 1 inch what is the radius of the cylinder’s base?