Math Problem Statement

Scott is a gardener. He wants to know the area of a circular patch of soil, so he can work out how many seeds he needs to plant. What is the area of the circle below? Round your answer to two decimal places. Use π = 3.14.

Solution

To calculate the area of the circular patch of soil, we use the formula for the area of a circle:

A=πr2A = \pi r^2

Here:

  • r=1.75mr = 1.75 \, \text{m} (the radius)
  • π=3.14\pi = 3.14

Step-by-step solution:

  1. Square the radius: r2=(1.75)2=3.0625r^2 = (1.75)^2 = 3.0625

  2. Multiply by π\pi: A=3.14×3.0625=9.621625A = 3.14 \times 3.0625 = 9.621625

  3. Round to two decimal places: A=9.62m2A = 9.62 \, \text{m}^2

Final Answer:

The area of the circular patch is 9.62 m².


Would you like me to explain any step in detail? Here are some related questions to explore further:

  1. How does rounding affect precision in area calculations?
  2. What happens if we use a more precise value for π\pi?
  3. How do you calculate the area for an irregular shape instead of a circle?
  4. How can you estimate the amount of seeds needed based on the area?
  5. What are other practical uses of area calculations in gardening?

Tip: Always double-check your rounding when working with measurements to ensure your result is accurate and practical!

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Math Problem Analysis

Mathematical Concepts

Geometry
Circle Area Calculation
Rounding

Formulas

Area of a Circle: A = πr²

Theorems

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Suitable Grade Level

Grades 6-8