Based on the answers provided, the following corrections need to be made to the 3D object:

1. Adjust the dimensions of the rectangle so that its length is approximately 5 times its width. This will help clarify the ratio between the length and width of the rectangle.

2. Modify the size of the cylinder so that its radius is approximately 1/3 of the width of the rectangle. This will help clarify the ratio between the cylinder's radius and the rectangle's width.