Calculate Cuboid Height: Given 8cm Length, 4cm Width, 96cm³ Volume

Cuboid Volume with Missing Dimension

The length of the cuboid is equal to 8 cm. and its width 4 cm.

Volume of the cuboid is equal to 96 cm.3

Calculate the height of the cuboid

888444

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find X
00:03 Use the formula to calculate box volume
00:07 Width times height times length
00:12 Substitute appropriate values and solve for X
00:22 Isolate X
00:28 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

The length of the cuboid is equal to 8 cm. and its width 4 cm.

Volume of the cuboid is equal to 96 cm.3

Calculate the height of the cuboid

888444

2

Step-by-step solution

To solve this problem, follow these steps:

  • Step 1: Identify the known values and the formula.
  • Step 2: Substitute the known values into the formula and solve for the unknown.
  • Step 3: Perform the calculations to find the height.

Now, let's work through each step:

Step 1: We know the length (LL) is 8cm8 \, \text{cm}, the width (WW) is 4cm4 \, \text{cm}, and the volume (VV) is 96cm396 \, \text{cm}^3. The formula for the volume of a cuboid is:

V=L×W×HV = L \times W \times H, where HH is the height.

Step 2: Rearrange the formula to solve for HH:

H=VL×WH = \frac{V}{L \times W}

Step 3: Substitute the known values:

H=968×4H = \frac{96}{8 \times 4}

Calculate the denominator:

8×4=328 \times 4 = 32

Substitute back into the equation:

H=9632H = \frac{96}{32}

Calculate the height:

H=3cmH = 3 \, \text{cm}.

Therefore, the height of the cuboid is 3cm3 \, \text{cm}.

3

Final Answer

3 cm

Key Points to Remember

Essential concepts to master this topic
  • Formula: Volume equals length × width × height for cuboids
  • Technique: Rearrange to H = V ÷ (L × W) = 96 ÷ (8 × 4)
  • Check: Verify: 8 × 4 × 3 = 96 cm³ matches given volume ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to divide by both dimensions
    Don't divide volume by just one dimension like 96 ÷ 8 = 12 cm! This ignores the width and gives the wrong height. The area of the base is 8 × 4 = 32 cm², so you need to divide the entire volume by this base area. Always divide volume by the product of the two known dimensions.

Practice Quiz

Test your knowledge with interactive questions

A rectangular prism has a base measuring 5 units by 8 units.

The height of the prism is 12 units.

Calculate its volume.

121212888555

FAQ

Everything you need to know about this question

Why do I need to multiply length and width first?

+

The base area of a cuboid is length × width. Think of volume as base area × height, so to find height, you divide volume by base area!

What if I get the formula wrong and use V = L + W + H?

+

That would be perimeter, not volume! Volume measures space inside the shape, which requires multiplication. Always use V=L×W×HV = L \times W \times H for cuboids.

How can I remember which dimension is missing?

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Read the problem carefully and list what you know. Here we have length = 8 cm, width = 4 cm, and volume = 96 cm³. The missing piece is height!

Why does my calculator show 3.0 instead of just 3?

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Both are correct! 3.0 cm and 3 cm mean the same thing. The decimal point just shows it's an exact division with no remainder.

Can I solve this without the volume formula?

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No, you must use the volume formula for cuboids. There's no other way to connect the given measurements (length, width, volume) to find the missing height.

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