7 cm त्रिज्या वाले वृत्त का अर्द्धपरिमाप ज्ञात करो -

Options

A. 36 cm
B. 30 cm
C. 14 cm
D. 20 cm

Answer

To find the ardhparimap (half perimeter) of a circle with a radius of 7 cm, we can follow these steps:

### Step-by-step Solution:

1. **Understand the formula for the perimeter of a circle**:
The perimeter (circumference) of a circle is given by the formula:
\[ C = 2 \pi r \]
where \( r \) is the radius of the circle.

2. **Substitute the radius into the formula**:
Here, the radius \( r \) is given as 7 cm. So, we substitute 7 cm into the formula:
\[ C = 2 \pi (7) \]

3. **Calculate the circumference**:
Now, we can calculate the circumference:
\[ C = 14 \pi \text{ cm} \]
(You can use \( \pi \approx 3.14 \) for numerical calculations if needed.)

4. **Find the ardhparimap (half perimeter)**:
Since we want the ardhparimap (half perimeter), we divide the circumference by 2:
\[ \text{Ardhparimap} = \frac{C}{2} = \frac{14 \pi}{2} = 7 \pi \text{ cm} \]

5. **Final result**:
Therefore, the ardhparimap of the circle with a radius of 7 cm is:
\[ \text{Ardhparimap} = 7 \pi \text{ cm} \]