Question

Find the area and circumference of a circle with radius 3.5 cm.

Answer 1

We are given a circle with:

• Radius r = 3.5 cm

We are to find:

• Area
• Circumference

Formulas:

• Area = πr²
• Circumference = 2πr

Use `π = 22/7`

Calculations:

1. Area = `22/7 xx 3.5 xx 3.5`

= `22/7 xx 7/2 xx 7/2`

= `22 xx 7/4`

= `154/4`

= 38.5 cm²

2. Circumference = `2 xx 22/7 xx 3.5`

= `44/7 xx 7/2`

= 22 cm

Final Answer:

Area = 38.5 cm²

Circumference = 22 cm