Math Problem Statement
A statue and a model of the statue are mathematically similar. The statue has a total surface area of 3600 cm2 The model has a total surface area of 625 cm2 The volume of the model is 750 cm2 Work out the volume of the statue. [HINT: First find the ratio of the lengths of the statue]
Solution
To find the volume of the statue, we’ll use the fact that the statue and the model are mathematically similar. Here’s the process:
Step 1: Find the Ratio of the Surface Areas
The surface area of the statue is , and the surface area of the model is .
Since they are similar, the ratio of the areas (surface areas) is given by:
Simplifying this, we get:
So, the area ratio is .
Step 2: Determine the Ratio of the Lengths
The area ratio for similar figures is the square of the length ratio. So, if the length ratio is , then:
To find , take the square root of both sides:
Thus, the length ratio is .
Step 3: Determine the Ratio of the Volumes
The volume ratio for similar figures is the cube of the length ratio. So:
Calculating this:
Step 4: Find the Volume of the Statue
Now, we know the volume of the model is , and we can use the volume ratio to find the volume of the statue:
Calculating this:
Final Answer
The volume of the statue is:
Would you like more details or have any questions?
Related Questions
- If the length of the model is 20 cm, what is the length of the statue?
- How would the volume change if the model’s surface area was 500 cm² instead of 625 cm²?
- What would the volume of the statue be if the model’s volume were doubled?
- What is the volume ratio if the surface area of the model is 900 cm² and the statue remains the same?
- How does the area ratio relate to the volume ratio in similar geometric objects?
Tip: For similar objects, remember that area scales by the square of the length ratio, and volume scales by the cube of the length ratio.
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Math Problem Analysis
Mathematical Concepts
Similar Figures
Ratio and Proportion
Surface Area and Volume Scaling
Formulas
Area Ratio = Surface Area of Statue / Surface Area of Model
Length Ratio = sqrt(Area Ratio)
Volume Ratio = (Length Ratio)^3
Volume of Statue = Volume of Model * Volume Ratio
Theorems
Similarity Theorem for Geometric Figures
Suitable Grade Level
Grades 9-10
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