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MArishka [77]
3 years ago
6

A right rectangular prism has these dimensions:

Mathematics
2 answers:
ki77a [65]3 years ago
5 0
Volume of rectangular prism = 1 1/3 x 5/6 x 2/3 = 4/3 x 5/6 x 2/3 = 20/27

Volume of cube = 1/6 x 1/6 x 1/6 = 1/216

Number of cubes that will pack the rectangular prism = 20/27 / 1/216 = 160
MakcuM [25]3 years ago
4 0

Answer:

The number of cubes required is 160.

Step-by-step explanation:

The dimensions of the right rectangular prisms are

l=1\frac{1}{3} \;units

w=\frac{5}{6} \;units

h=\frac{2}{3} \;units


The volume of the right rectangular prism is

V=l\times b\times h.

We substitute the dimensions to get,

V=1\frac{1}{3}\times \frac{5}{6}\times \frac{2}{3}.


We convert the first mixed number to improper fraction,

V=\frac{4}{3}\times \frac{5}{6}\times \frac{2}{3}.


We multiply out to obtain,

V=\frac{40}{54}


V=\frac{20}{27} cubic units.



We need to determine the volume of the cube of side length,

l=\frac{1}{6} units.


The volume of a cube is given by,

V=l^3

This implies that,

V=(\frac{1}{6})^3


This gives us,

V=\frac{1}{216} cubic units.


We now divide the volume of the right rectangular prism by the volume of the cube to determine the number of cubes required.


Number\:of\:cubes=\frac{\frac{20}{27} }{\frac{1}{216} }


We simplify to get,

Number\:of\:cubes=\frac{20}{27} \div \frac{1}{216}


This implies that,

Number\:of\:cubes=\frac{20}{27} \times \frac{216}{1}


Number\:of\:cubes=20\times8


Number\:of\:cubes=160





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