Find the circumference of a circle of radius 10 cm. `(Take pi = 3.14.]`

Options

A. `72.8cm`
B. `62.8cm`
C. `82.8cm`
D. `92.8cm`

Answer

To find the circumference of a circle with a radius of 10 cm, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the formula for circumference**:
The formula for the circumference (C) of a circle is given by:
\[ C = 2 \pi r \]
where \( r \) is the radius of the circle and \( \pi \) is a constant approximately equal to 3.14.

2. **Substitute the values into the formula**:
Here, the radius \( r \) is given as 10 cm. Substituting this value into the formula, we get:
\[ C = 2 \times 3.14 \times 10 \]

3. **Calculate the multiplication**:
First, calculate \( 2 \times 3.14 \):
\[ 2 \times 3.14 = 6.28 \]
Now, multiply this result by the radius (10 cm):
\[ C = 6.28 \times 10 = 62.8 \text{ cm} \]

4. **Final result**:
Therefore, the circumference of the circle is:
\[ C = 62.8 \text{ cm} \]

### Final Answer:
The circumference of the circle is **62.8 cm**.

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