Volume of Rectangular Prisms

Question

A rectangular prism is completely packed with 84 cubes of edge length fraction 1 over 3 inches, without any gap or overlap. Which of these best describes the volume of this rectangular prism?

Answer 1

1. 

Options are not presented.

2.

length: 12(1/4) = 3 in

width: 8(1/4) = 2 in

height: 5(1/4) = 1.25 in

 

V = length · width · height ?