A rectangular prism has a length of 8 in., a width of 4 in., and a height of 2 1/4 in. The prism is filled with cubes that have edge lengths of 14 in. How many cubes are needed to fill the rectangular prism?

Respuesta :

The number of cubes that will fill the rectangular prism is 4608 cubes.

Volume of rectangular prism:

  • v = lwh

where

l = length

w = width

h = height

Therefore,

v = 8 × 4 × 9 / 4

v = 288 / 4

volume of the rectangular prism = 72 in³

let's find the volume of each cube,

volume of the cube = l³

where

l = length

Therefore,

v = (1 / 4)³

v = 1 / 64 in³

Therefore, the number of cubes that will fill the rectangular prism is as follows;

number of cube = 72 ÷ 1 / 64 = 72 × 64 = 4608 cubes

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