The number of cube that can be packed in the rectangular prism is 30 cubes
Volume of the rectangular prism in terms of small cube and unit cube = 30(1 / 8) ft³
volume of rectangular prism = lwh
where
Therefore,
volume of rectangular prism = 3 / 2 × 1 × 5 / 2 = 15 / 4 ft³
volume of cube = 1 / 2 × 1 / 2 × 1 / 2 = 1 / 8 ft³
number of cube that can be packed in the rectangular prism = 15 / 4 × 8 = 30 cubes
Volume of the rectangular prism in terms of small cube and unit cube = 30(1 / 8) ft³
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