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

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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

Calculate the volume of the rectangular prism below using the data provided.

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FAQ

Everything you need to know about this question

Why do I need to multiply length and width first?

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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?

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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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