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

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

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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