Correct Answer - Option 1 :

441π cm^{2}, 42π cm

**Given:**

The radius of a circle is 21 cm.

**Formula:**

Area of a circle = πr^{2}

Circumference of a circle = 2πr

Where r = radius of a circle.

**Calculation:**

Area of the circle = πr^{2}

So, Area would be π × 21 cm × 21 cm = 441π cm^{2}

Circumference of a circle = 2πr

So, Circumference would be 2 × π × 21 cm = 42π cm

**∴ The area and the circumference of the circular ground ****are **441π cm2** and 42π cm respectively. **