What is the radius of a circle if the circumference is 31.4 m? (2020)

₹0.0

Question: What is the radius of a circle if the circumference is 31.4 m? (2020)

Options:

Correct Answer: 5 m

Exam Year: 2020

Solution:

Circumference = 2πr; 31.4 = 2πr; r = 31.4/(2π) ≈ 5 m.

What is the radius of a circle if the circumference is 31.4 m? (2020)

What is the radius of a circle if the circumference is 31.4 m? (2020)

Step 1: Understand that the circumference of a circle is given by the formula: Circumference = 2πr, where r is the radius.
Step 2: We know the circumference is 31.4 m, so we can write the equation: 31.4 = 2πr.
Step 3: To find the radius (r), we need to isolate r in the equation. We can do this by dividing both sides by 2π.
Step 4: Rewrite the equation: r = 31.4 / (2π).
Step 5: Now, calculate the value of r using the approximate value of π (3.14): r ≈ 31.4 / (2 * 3.14).
Step 6: Calculate 2 * 3.14, which is approximately 6.28.
Step 7: Now divide 31.4 by 6.28: r ≈ 31.4 / 6.28 ≈ 5 m.

No concepts available.