Calculate Cuboid Length: Volume 96 cm³ with 3:2 Ratio and Height 4 cm

A cuboid has a height of 4 cm.

The ratio between its length and its width is 3:2.

The volume of the cuboid is equal to 96 cm³.

Calculate the length of the cuboid.

444

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Calculate the length of the box
00:03 The ratio of edges according to the given data
00:10 Let's mark with X
00:17 Use the formula for calculating box volume
00:20 width times height times length
00:25 Substitute appropriate values and solve for X
00:51 Isolate X
01:05 This is the size of X, must be positive as it's the size of an edge
01:10 Substitute the X value we found to find the length of the box
01:20 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

A cuboid has a height of 4 cm.

The ratio between its length and its width is 3:2.

The volume of the cuboid is equal to 96 cm³.

Calculate the length of the cuboid.

444

2

Step-by-step solution

To solve this problem, we need to find the length of the cuboid using its volume and given dimensions. Let's break this down:

  • Step 1: Express the length and width using the ratio given. Let l=3x l = 3x and w=2x w = 2x , where x x is a common factor.
  • Step 2: Apply the formula for the volume of the cuboid, V=l×w×h V = l \times w \times h . Given that h=4 h = 4 cm and V=96 V = 96 cm³, the equation becomes:
96=(3x)×(2x)×4 96 = (3x) \times (2x) \times 4

Now, simplify and solve for x x :

96=24x2 96 = 24x^2

Dividing both sides by 24 gives:

x2=4 x^2 = 4

Taking the square root of both sides, we find:

x=2 x = 2

Thus, the length of the cuboid is:

l=3x=3×2=6 cm l = 3x = 3 \times 2 = 6 \text{ cm}

Therefore, the solution to the problem is 6 cm 6 \text{ cm} .

3

Final Answer

6 cm

Practice Quiz

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

The height of the prism is 12 units.

Calculate its volume.

121212888555

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