Question

Calculate the area and perimeter of the following ring where a = 7cm, b = 14cm Area of Ring: Perimeter of Ring:

Answer 1

Answer:

Step-by-step explanation:

1.Circumference of circle = 2πr

Perimeter of ring = 2πr = 2 × 22/7 × 7

Perimeter of ring = 2πr = 2 × 22/7 × 7 = 44 cm

Area of circle = πr²

Area of ring = πr² = 22/7 × 7 × 7 cm²

Area of ring = πr² = 22/7 × 7 × 7 cm² = 154 cm²

2. Circumference of circle = 2πr

Perimeter of ring = 2πr = 2 × 22/7 × 14

Perimeter of ring = 2πr = 2 × 22/7 × 14 = 88 cm

Area of circle = πr²

Area of ring = πr² = 22/7 × 14 × 14 cm²

Area of ring = πr² = 22/7 × 14× 14 cm² = 616 cm²