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After visiting the Needleton Natural Museum, Irma was so fascinated by the reptile exhibit that she got her very own pet lizard. Irma bought a terrarium shaped like a rectangular prism for her lizard to live in. The terrarium is $20$ inches long, $15$ inches wide, and $12$ inches tall. $\newline$ Which equation can you use to find the volume of the terrarium, $V$ ? $\newline$ Choices: $\newline$ (A) $20 \times 15 = 12 \times V$ $\newline$ (B) $V = 20 \times 15 \times 12$ $\newline$ What is the volume of the terrarium? $\newline$ Write your answer as a whole number or decimal. Do not round. $\newline$ ____ cubic inches

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Volume of cubes and rectangular prisms: word problems

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Q. After visiting the Needleton Natural Museum, Irma was so fascinated by the reptile exhibit that she got her very own pet lizard. Irma bought a terrarium shaped like a rectangular prism for her lizard to live in. The terrarium is

20

inches long,

15

inches wide, and

12

inches tall.

\newline

Which equation can you use to find the volume of the terrarium,

V

?

\newline

Choices:

\newline

(A)

20 \times 15 = 12 \times V

\newline

(B)

V = 20 \times 15 \times 12

\newline

What is the volume of the terrarium?

\newline

Write your answer as a whole number or decimal. Do not round.

\newline

____ cubic inches

Identify formula: Identify the correct formula to calculate the volume of the terrarium. The volume $V$ of a rectangular prism is calculated by multiplying its length, width, and height. Therefore, the correct choice is (B) $V = 20 \times 15 \times 12$ .
Calculate volume: Calculate the volume using the chosen formula. Volume = $20 \, \text{inches} \times 15 \, \text{inches} \times 12 \, \text{inches}$ .
Perform multiplication: Perform the multiplication to find the volume. Volume = $20 \times 15 \times 12 = 3600$ cubic inches.

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