Calculate Surface Area: 3×5×8 Cuboid Problem

Look at the the cuboid below.

What is its surface area?

333555888

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Calculate the surface area of the box
00:03 We'll use the formula to calculate the surface area of a box
00:08 2 x (the sum of face areas)
00:16 Substitute appropriate values into the formula and solve to find the surface area
00:43 We'll solve each multiplication separately and add them together
00:59 Here is the solution

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Look at the the cuboid below.

What is its surface area?

333555888

2

Step-by-step solution

First, we recall the formula for the surface area of a cuboid:

(width*length + height*width + height*length) *2

As in the cuboid the opposite faces are equal to each other, the given data is sufficient to arrive at a solution.

We replace the data in the formula:

(8*5+3*5+8*3) *2 =

(40+15+24) *2 =

79*2 =

158

3

Final Answer

158

Practice Quiz

Test your knowledge with interactive questions

A cuboid is shown below:

222333555

What is the surface area of the cuboid?

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