33.8k views
0 votes
Sketch a rectangular prism with dimensions 2 cm by 3cm by 4cm. What is the volume and surface area?

1 Answer

6 votes

To find the volume of a rectangular prism, we need to multiply lenght by height by width:


V=2\operatorname{cm}\cdot3\operatorname{cm}\cdot4\operatorname{cm}=24\operatorname{cm}^3

To find the surface area, we need to calculate the area of each of the rectangles.

We have:

2 rectangles 3cm by 4cm

2 rectangles 4cm by 2 cm

2 rectangles 2cm by 3cm

Then we calculate the area of each one:


\begin{gathered} 3cm\cdot4\operatorname{cm}=12\operatorname{cm}^2 \\ 4\operatorname{cm}\cdot2\operatorname{cm}=8\operatorname{cm}^2 \\ 2\operatorname{cm}\cdot3\operatorname{cm}=6\operatorname{cm}^2 \end{gathered}

Since there are 2 of each, we multiply each by 2:


\begin{gathered} 2\cdot12\operatorname{cm}=24\operatorname{cm}^2 \\ 2\cdot8\operatorname{cm}=16\operatorname{cm}^2 \\ 2\cdot6\operatorname{cm}=12\operatorname{cm}^2 \end{gathered}

Finally we add the areas:


24\operatorname{cm}+16\operatorname{cm}+12\operatorname{cm}=52\operatorname{cm}^2

Then the volume is 24cm^3 and the surface area is 52cm^2

Sketch a rectangular prism with dimensions 2 cm by 3cm by 4cm. What is the volume-example-1
User Schleichardt
by
5.6k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.