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natta225 [31]
3 years ago
15

The volume of a rectangular prism is given by the formula V=lwh, where I is the length of the prism, w is the width, and h is th

e height. Which expression represents the volume of the following rectangular prism?

Mathematics
2 answers:
irinina [24]3 years ago
8 0

Answer:

Volume = 6x^3+39x^2+54x

Step-by-step explanation:

Prism is an object which has two  bases which are parallel to each other and other faces are parallelograms .

Rectangular prism is a three dimensional figure which has 6 faces which are all rectangles .

Let l be the length of rectangular prism , w be the width of prism and h be the height of prism .

Then volume of rectangular prism is equal to lwh .

We will also use formula: a(b+c)=ab+ac

Here,

l=x+2\\w=3x\\h=2x+9

Therefore,

volume of rectangular prism is calculated as follows:

V=\left ( x+2 \right )\left ( 3x \right )\left ( 2x+9 \right )\\=\left ( 3x^2+6x \right )\left ( 2x+9 \right )\\=3x^2\left ( 2x+9 \right )+6x\left ( 2x+9 \right )\\=6x^3+27x^2+12x^2+54x\\=6x^3+39x^2+54x

antoniya [11.8K]3 years ago
3 0

Answer:

The answer is 6x^{3} +39x^{2}+54x

Step-by-step explanation:

Volume of the rectangular prism = Length * Width * Height

Length (l) = x+2

Width (w) = 3x

Height (h) = 2x+9

By substituting these values to the equation above,

Volume of the rectangular prism = (x+2)*3x*(2x+9)

                                                      =(3x^{2} +6x)*(2x+9)

                                                      =6x^{3} +27x^{2} +12x^{2} +54x

                                                      =6x^{3} +39x^{2}+54x

Therefore,

The answer is 6x^{3} +39x^{2}+54x


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