Calculate Cuboid Volume: 10cm Width with 40% and 50% Dimensional Relations

Volume Calculation with Percentage Relations

Given the cuboid whose width is 10 cm

Its length is less in 40% than the width of the cuboid.

The height of the cuboid is 50% greater than the length of the cuboid.

Calculate the volume of the cube

101010

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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 box
00:03 Width of the box according to the given data
00:07 Length of the box according to the given data, convert from percentages to numbers
00:14 Length of the box
00:18 Height of the box according to the given data, convert from percentages to numbers
00:27 Height of the box
00:39 Use the formula to calculate box volume
00:43 Width times height times length
00:48 Substitute appropriate values and solve for volume
01:06 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

Given the cuboid whose width is 10 cm

Its length is less in 40% than the width of the cuboid.

The height of the cuboid is 50% greater than the length of the cuboid.

Calculate the volume of the cube

101010

2

Step-by-step solution

To solve this problem, we must calculate the missing dimensions of the cuboid and use the volume formula:

  • Step 1: Determine the length of the cuboid.
  • Step 2: Calculate the height of the cuboid.
  • Step 3: Compute the volume using the cuboid's dimensions.

Let's work through each step in detail:

Step 1: Determine the Length.

The width of the cuboid is given as 10cm 10 \, \text{cm} . The length is 40% less than the width. To find the length:

Length=Width0.4×Width \text{Length} = \text{Width} - 0.4 \times \text{Width}

Length=100.4×10=104=6cm \text{Length} = 10 - 0.4 \times 10 = 10 - 4 = 6 \, \text{cm}

Step 2: Calculate the Height.

The height is 50% greater than the length. To find the height:

Height=Length+0.5×Length \text{Height} = \text{Length} + 0.5 \times \text{Length}

Height=6+0.5×6=6+3=9cm \text{Height} = 6 + 0.5 \times 6 = 6 + 3 = 9 \, \text{cm}

Step 3: Compute the Volume.

The volume of the cuboid is given by:

V=Length×Width×Height V = \text{Length} \times \text{Width} \times \text{Height}

V=6×10×9=540cm3 V = 6 \times 10 \times 9 = 540 \, \text{cm}^3

Thus, the volume of the cuboid is 540cm3\boxed{540 \, \text{cm}^3}.

3

Final Answer

540 cm³

Key Points to Remember

Essential concepts to master this topic
  • Dimension Formula: Calculate each dimension using percentage increases and decreases
  • Technique: 40% less means multiply by 0.6: 10 × 0.6 = 6 cm
  • Check: Verify length × width × height: 6 × 10 × 9 = 540 cm³ ✓

Common Mistakes

Avoid these frequent errors
  • Converting percentages incorrectly for increases and decreases
    Don't add 40% to find "40% less" = 14 cm instead of 6 cm! This confuses increases with decreases and gives massive volume errors. Always subtract percentages for "less than" and add for "greater than".

Practice Quiz

Test your knowledge with interactive questions

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

888333222

FAQ

Everything you need to know about this question

What does '40% less than' actually mean?

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40% less than means you subtract 40% from the original value. So for width 10 cm: 10(0.4×10)=104=6 10 - (0.4 \times 10) = 10 - 4 = 6 cm. Don't add the percentage!

How is '50% greater than' different from '50% less than'?

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50% greater than means you add 50% to the original value, while 50% less than means you subtract 50%. Greater = add, less = subtract!

Why do I multiply by 0.6 for 40% less?

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When something is 40% less, you keep 60% of the original value. So multiply by 0.6 (which is 60% as a decimal). This gives the same result as subtracting 40%.

Can I use shortcuts for these percentage calculations?

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Yes! For x% less, multiply by (10.0x) (1 - 0.0x) . For y% greater, multiply by (1+0.0y) (1 + 0.0y) . This saves steps and reduces errors.

What if I get the wrong volume - how do I find my mistake?

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Check each dimension separately first! Verify: Length = 6 cm, Height = 9 cm, Width = 10 cm. Then double-check your multiplication: 6×10×9 6 \times 10 \times 9 .

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