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The area of a circle is 78.5 square meters. What is the radius of the circle? (U

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Question: The area of a circle is 78.5 square meters. What is the radius of the circle? (Use π = 3.14)

Options:

  1. 5
  2. 6
  3. 7
  4. 8

Correct Answer: 6

Solution: 

Area = π × radius²; 78.5 = 3.14 × radius²; radius² = 78.5 / 3.14 = 25; radius = √25 = 5 meters.

The area of a circle is 78.5 square meters. What is the radius of the circle? (U

Practice Questions

Q1
The area of a circle is 78.5 square meters. What is the radius of the circle? (Use π = 3.14)
  1. 5
  2. 6
  3. 7
  4. 8

Questions & Step-by-Step Solutions

The area of a circle is 78.5 square meters. What is the radius of the circle? (Use π = 3.14)
  • Area of a Circle – Understanding the formula for the area of a circle (A = πr²) and how to manipulate it to find the radius.
  • Basic Algebra – Applying algebraic operations to isolate the variable (radius) in the equation.
  • Use of π – Recognizing the value of π as given (3.14) and using it correctly in calculations.
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