Math Problem Statement

How many flowers, spaced every 3 in., are needed to surround a circular garden with a 200-ft radius? Use 3.14 for π.

Solution

To solve the problem, we need to determine how many flowers, spaced every 3 inches, are needed to surround a circular garden with a 200-ft radius, using π=3.14\pi = 3.14.

Step-by-Step Solution:

  1. Calculate the Circumference of the Circle: The formula for the circumference CC of a circle is: C=2πrC = 2 \pi r where rr is the radius and π=3.14\pi = 3.14. Here, the radius rr is 200 feet.

    So, C=2×3.14×200=1256 feetC = 2 \times 3.14 \times 200 = 1256 \text{ feet}

  2. Convert Feet to Inches: Since the flowers are spaced every 3 inches, we need to convert the circumference from feet to inches. There are 12 inches in a foot, so: C=1256×12=15072 inchesC = 1256 \times 12 = 15072 \text{ inches}

  3. Determine the Number of Flowers: The number of flowers can be found by dividing the total circumference in inches by the spacing between the flowers (3 inches): Number of flowers=150723=5024\text{Number of flowers} = \frac{15072}{3} = 5024

Final Answer:

5024 flowers are needed to surround the circular garden.


Would you like more details on any part of this solution, or have any questions?

Here are 5 related questions for practice:

  1. What would be the circumference of a circle with a radius of 150 feet?
  2. If the flowers were spaced 6 inches apart, how many flowers would be needed?
  3. How would the number of flowers change if the radius was 300 feet?
  4. What is the area of the circular garden with a 200-ft radius?
  5. How many flowers would be needed if the garden was a square with a perimeter of 1256 feet?

Tip: Always ensure you convert units (like feet to inches) when dealing with different scales in a problem.

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Math Problem Analysis

Mathematical Concepts

Geometry
Circumference of a Circle
Unit Conversion

Formulas

Circumference of a Circle: C = 2πr
Unit Conversion: Feet to Inches

Theorems

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Suitable Grade Level

Grades 6-8