Calculate Volume: Combining Two Prisms of 6×7×3 and 3×5×4 Meters

Volume Addition with Combined Prisms

The dimensions of the prism 1 are 6,7,3 meters.

From two orthohedra of the same size we build the body in the first drawing

The dimensions of the prism 2 are 3,5,4 meters.

From two orthohedra of the same size we build the body in the second drawing.

Glue the two figures together and find the volume of the resulting body.

66677733333355544412

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Calculate the volume of the shared body
00:03 We'll use the formula for calculating box volume
00:07 height times length times width
00:11 We'll substitute appropriate values and solve for the volume
00:15 This is box 1 volume, now let's find box 2 volume the same way
00:19 We'll substitute appropriate values and solve for box 2 volume
00:24 This is box 2 volume
00:29 Now we'll multiply each volume by the appropriate number of boxes and sum
00:46 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 dimensions of the prism 1 are 6,7,3 meters.

From two orthohedra of the same size we build the body in the first drawing

The dimensions of the prism 2 are 3,5,4 meters.

From two orthohedra of the same size we build the body in the second drawing.

Glue the two figures together and find the volume of the resulting body.

66677733333355544412

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Calculate the volume of one prism of each type using the formula for volume: Volume=length×width×height \text{Volume} = \text{length} \times \text{width} \times \text{height} .
  • Step 2: Multiply each result by two since two identical prisms form each body.
  • Step 3: Sum the volumes of the two bodies to get the total volume of the combined structure.

Now, let's work through each step:

Step 1: Calculate the volume of Prism 1:
For Prism 1 with dimensions 6m×7m×3m6 \, \text{m} \times 7 \, \text{m} \times 3 \, \text{m}, the volume is:

Volume of one Prism 1=6×7×3=126m3\text{Volume of one Prism 1} = 6 \times 7 \times 3 = 126 \, \text{m}^3.

Step 2: Since the body is made from two Prism 1 structures, multiply by 2:

Total Volume of first body=2×126=252m3\text{Total Volume of first body} = 2 \times 126 = 252 \, \text{m}^3.

Step 3: Calculate the volume of Prism 2:
For Prism 2 with dimensions 3m×5m×4m3 \, \text{m} \times 5 \, \text{m} \times 4 \, \text{m}, the volume is:

Volume of one Prism 2=3×5×4=60m3\text{Volume of one Prism 2} = 3 \times 5 \times 4 = 60 \, \text{m}^3.

Since the second body is made from two Prism 2 structures, multiply by 2:

Total Volume of second body=2×60=120m3\text{Total Volume of second body} = 2 \times 60 = 120 \, \text{m}^3.

Finally, add the two total volumes together to find the volume of the combined structure:

Total Volume=252+120=372m3\text{Total Volume} = 252 + 120 = 372 \, \text{m}^3.

Therefore, the volume of the resulting body is 372m3 372 \, \text{m}^3 .

3

Final Answer

372 372

Key Points to Remember

Essential concepts to master this topic
  • Volume Formula: Length × width × height for each rectangular prism
  • Technique: Calculate 6×7×3 = 126, then multiply by 2 prisms = 252
  • Check: Sum individual volumes: 252 + 120 = 372 m³ ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to multiply by two for each body
    Don't calculate 6×7×3 = 126 and 3×5×4 = 60, then add 126 + 60 = 186! This ignores that each body is made from TWO identical prisms. Always multiply each prism volume by 2 before adding the bodies together.

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 multiply each prism volume by 2?

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The problem states that each body is made from two orthohedra of the same size. So you need two copies of each prism to build each body structure shown in the diagrams.

What does 'orthohedra' mean?

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Orthohedron is just another name for a rectangular prism! It's a 3D shape where all angles are right angles, like a box with length, width, and height.

Do the prisms overlap when glued together?

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No! When two separate bodies are glued together, you simply add their volumes. There's no subtraction needed because they don't share any interior space.

How do I remember the volume formula?

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Think of filling a box with unit cubes! You need length × width cubes for one layer, then stack that pattern height times. That's why it's L × W × H.

What if the dimensions were given in different units?

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Always convert to the same unit first! If you have meters and centimeters, convert everything to meters (or centimeters) before calculating volume.

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