What is the radius of a circle if its circumference is 62.8 cm? (2022)

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Question: What is the radius of a circle if its circumference is 62.8 cm? (2022)

Options:

Correct Answer: 10 cm

Exam Year: 2022

Solution:

Circumference = 2πr; 62.8 = 2πr; r = 10 cm.

What is the radius of a circle if its circumference is 62.8 cm? (2022)

What is the radius of a circle if its circumference is 62.8 cm? (2022)

Step 1: Understand the formula for the circumference of a circle, which is Circumference = 2πr, where r is the radius.
Step 2: We know the circumference is 62.8 cm, so we can write the equation: 62.8 = 2πr.
Step 3: To find the radius (r), we need to isolate r in the equation. First, divide both sides by 2π.
Step 4: Calculate 2π. Using π ≈ 3.14, we find 2π ≈ 6.28.
Step 5: Now, divide 62.8 by 6.28 to find r: r = 62.8 / 6.28.
Step 6: Perform the division: r = 10 cm.

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