Use the ratio of the number of people per
 square foot (2.5 square ft. per person) to
 estimate the size of a crowd that is 12.5 feet
 deep on both sides of a street for a 6 mile
 stretch and is filled with people.


A. 79,200
B. 158,400
C. 316,800
D. 441,575

To estimate the size of the crowd, we need to use the given ratio of **2.5 square feet per person** and calculate the total area available for people to stand in along both sides of a street for a **6-mile stretch** that is **12.5 feet deep** on each side.

Here are the steps:

### 1. Convert the length of the street to feet:
- 1 mile = 5,280 feet
- Total length of 6 miles:
  \[
  6 \text{ miles} \times 5,280 \text{ feet/mile} = 31,680 \text{ feet}
  \]

### 2. Calculate the total width covered by people on both sides of the street:
- Since each side of the street is 12.5 feet deep, for both sides:
  \[
  12.5 \text{ feet} \times 2 = 25 \text{ feet}
  \]

### 3. Calculate the total area available for people:
- Multiply the length of the street by the total width on both sides:
  \[
  31,680 \text{ feet} \times 25 \text{ feet} = 792,000 \text{ square feet}
  \]

### 4. Calculate the number of people using the ratio (2.5 square feet per person):
- Divide the total area by the square footage needed per person:
  \[
  \frac{792,000 \text{ square feet}}{2.5 \text{ square feet/person}} = 316,800 \text{ people}
  \]

### Final Answer:
The estimated size of the crowd is **316,800 people**.

Thus, the correct answer is:

**C. 316,800**

---

Would you like more details on any part of this calculation, or do you have any further questions?

Here are 5 related questions for practice:
1. If the depth of the crowd on each side was only 10 feet, how many people would fit?
2. What would the crowd size be if the street was 8 miles long instead of 6 miles?
3. How much area would a crowd of 200,000 people cover using the same ratio of 2.5 square feet per person?
4. If the crowd density changed to 3 square feet per person, how many people would fit in the original space?
5. How would the calculation change if only one side of the street was filled with people?

**Tip:** Always double-check unit conversions when dealing with miles, feet, or any other measurements in different systems.

Use the ratio of the number of people per square foot (2.5 square ft. per person) to estimate the size of a crowd that is 12.5 feet deep on both sides of a street for a 6 mile stretch and is filled with people.

Learn how to estimate the size of a crowd using a ratio of 2.5 square feet per person. This example covers a 6-mile street stretch with a crowd depth of 12.5 feet on both sides. Step-by-step calculations show how to convert miles to feet and calculate the total area and crowd size. Suitable for Grades 7-10.

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