Look at the cuboid of the figure:
The volume of the cuboid is
60 cm³.
Work out the value of X.
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Look at the cuboid of the figure:
The volume of the cuboid is
60 cm³.
Work out the value of X.
To solve the problem of finding for a cuboid with a given volume, we proceed as follows:
Now, let's solve this equation step-by-step:
First, calculate the product involving :
.
Simplify the left side:
.
Next, distribute the 15 on the left side:
.
To isolate , subtract 30 from both sides:
.
Finally, divide both sides by 15 to solve for :
.
Therefore, the value of is .
A rectangular prism has a base measuring 5 units by 8 units.
The height of the prism is 12 units.
Calculate its volume.
For any cuboid, multiply all three dimensions together: length × width × height. The order doesn't matter - just make sure you use all three measurements!
Look carefully at the diagram labels. In this problem, the dimensions are 5 (bottom edge), X+2 (side edge), and 3 (height). Each cuboid has exactly three different measurements.
The volume is already given as 60 cm³! Your job is to work backwards - use the known volume and two known dimensions to find the unknown dimension X+2.
No! Since X+2 represents a length, it must be positive. If your algebra gives you X = -5, that would mean a dimension of -3 cm, which is impossible for a real object.
Substitute back: if X = 2, then dimensions are 5 × 4 × 3. Calculate: 5 × 4 × 3 = 60 ✓ This matches the given volume, so X = 2 is correct!
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