Question

All you know is that Three faces are Rectangular. Is possible that the object is a rectangular prism.

Answer 1

When object has three faces rectangular, it cannot be a rectangular prism because all the opposite faces of a rectangular prism are equal.

We also have following properties of rectangular prism.

• A rectangular prism has 8 vertices, 12 sides and 6 rectangular faces.
• All the opposite faces of a rectangular prism are equal. 
• A rectangular prism has a rectangular cross section.