One hundred pyramid-shaped chocolate candies with a square base with 12 mm sides and height of 15 mm are melted in a cylindrical pot. If the pot has a radius of 75 mm, what is the height of the melted candies in the pot?

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
Question
### Volume Calculation of Melted Pyramid-Shaped Candies

**Problem Statement:**
One hundred pyramid-shaped chocolate candies with a square base with 12 mm sides and height of 15 mm are melted in a cylindrical pot. If the pot has a radius of 75 mm, what is the height of the melted candies in the pot?

**Solution:**

1. **Calculate the volume of one pyramid-shaped candy:**

   The formula for the volume of a pyramid with a square base is:
   \( V = \frac{1}{3} \times \text{base area} \times \text{height} \)

   - Base area (\( A \)) = side\(^2\)
     \[ A = 12 \, \text{mm} \times 12 \, \text{mm} = 144 \, \text{mm}^2 \]

   - Height (\( h \)) = 15 mm

   - Volume (\( V \)) of one pyramid-shaped candy:
     \[ V = \frac{1}{3} \times 144 \, \text{mm}^2 \times 15 \, \text{mm} \]
     \[ V = \frac{1}{3} \times 2160 \, \text{mm}^3 \]
     \[ V = 720 \, \text{mm}^3 \]

2. **Calculate the total volume of 100 pyramid-shaped candies:**

   - Total volume:
     \[ V_{\text{total}} = 100 \times 720 \, \text{mm}^3 \]
     \[ V_{\text{total}} = 72,000 \, \text{mm}^3 \]

3. **Calculate the height of the melted candies in the cylindrical pot:**

   The formula for the volume of a cylinder is:
   \[ V = \pi r^2 h \]

   - Given:
     - Radius (\( r \)) = 75 mm
     - Total volume (\( V_{\text{total}} \)) = 72,000 mm\(^3\)

   - Height (\( h \)) is unknown. Rearrange the volume formula to solve for \( h \):
     \[ h = \frac{V}{\pi r^2} \]
     \[ h = \frac{72,000
Transcribed Image Text:### Volume Calculation of Melted Pyramid-Shaped Candies **Problem Statement:** One hundred pyramid-shaped chocolate candies with a square base with 12 mm sides and height of 15 mm are melted in a cylindrical pot. If the pot has a radius of 75 mm, what is the height of the melted candies in the pot? **Solution:** 1. **Calculate the volume of one pyramid-shaped candy:** The formula for the volume of a pyramid with a square base is: \( V = \frac{1}{3} \times \text{base area} \times \text{height} \) - Base area (\( A \)) = side\(^2\) \[ A = 12 \, \text{mm} \times 12 \, \text{mm} = 144 \, \text{mm}^2 \] - Height (\( h \)) = 15 mm - Volume (\( V \)) of one pyramid-shaped candy: \[ V = \frac{1}{3} \times 144 \, \text{mm}^2 \times 15 \, \text{mm} \] \[ V = \frac{1}{3} \times 2160 \, \text{mm}^3 \] \[ V = 720 \, \text{mm}^3 \] 2. **Calculate the total volume of 100 pyramid-shaped candies:** - Total volume: \[ V_{\text{total}} = 100 \times 720 \, \text{mm}^3 \] \[ V_{\text{total}} = 72,000 \, \text{mm}^3 \] 3. **Calculate the height of the melted candies in the cylindrical pot:** The formula for the volume of a cylinder is: \[ V = \pi r^2 h \] - Given: - Radius (\( r \)) = 75 mm - Total volume (\( V_{\text{total}} \)) = 72,000 mm\(^3\) - Height (\( h \)) is unknown. Rearrange the volume formula to solve for \( h \): \[ h = \frac{V}{\pi r^2} \] \[ h = \frac{72,000
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