A A rectangular prism is completely packed with 63 cubes of edge length inch, without any gap or overtap. Which of these best describes the volume of this rectangular prism?
cubic inch each
O2 unit cubes and 2 smaller cubes of volume
-IN
O2 unit cubes and 9 smaller cubes of volume cubic inch each
O 4 unit cubes and 2 smaller cubes of volume cubic inch each
27
O 4 unit cubes and 3 smaller cubes of volume
cubic inch each