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If the length of a side of a cube is doubled, how does the volume change?
Practice Questions
Q1
If the length of a side of a cube is doubled, how does the volume change?
Increases by 2 times
Increases by 4 times
Increases by 8 times
Remains the same
Questions & Step-by-Step Solutions
If the length of a side of a cube is doubled, how does the volume change?
Steps
Concepts
Step 1: Understand that a cube has sides of equal length. Let's call the length of one side 'a'.
Step 2: The formula for the volume of a cube is V = a³, which means you multiply the length of the side by itself three times.
Step 3: If we double the length of the side, the new length becomes 2a.
Step 4: Now, we need to find the new volume using the new side length. The new volume is V = (2a)³.
Step 5: Calculate (2a)³. This means (2a) * (2a) * (2a).
Step 6: When you multiply it out, you get 2 * 2 * 2 * a * a * a = 8a³.
Step 7: Compare the new volume (8a³) to the original volume (a³).
Step 8: Since 8a³ is 8 times a³, we conclude that the volume increases by 8 times.
Volume of a Cube
– Understanding the formula for the volume of a cube (V = a³) and how changes in the side length affect the volume.
Exponential Growth
– Recognizing that doubling a linear dimension results in an exponential increase in volume.
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