Question

Q1. Calculate the perimeter of the following ring where a = 7cm, b = 14cm

Answer 1

Answer:

154 cm²

Step-by-step explanation:

Circumference of circle = 2πr

Circumference of circle = 2πrCircumference of circle = 2πr = 2 × 22/7 × 7

Circumference of circle = 2πrCircumference of circle = 2πr = 2 × 22/7 × 7Circumference of circle = 2πr = 2 × 22/7 × 7 = 44 cm

Circumference of circle = 2πrCircumference of circle = 2πr = 2 × 22/7 × 7Circumference of circle = 2πr = 2 × 22/7 × 7 = 44 cmArea of circle = πr²

Circumference of circle = 2πrCircumference of circle = 2πr = 2 × 22/7 × 7Circumference of circle = 2πr = 2 × 22/7 × 7 = 44 cmArea of circle = πr²Area of circle = πr² = 22/7 × 7 × 7 cm²

Circumference of circle = 2πrCircumference of circle = 2πr = 2 × 22/7 × 7Circumference of circle = 2πr = 2 × 22/7 × 7 = 44 cmArea of circle = πr²Area of circle = πr² = 22/7 × 7 × 7 cm²Area of circle = πr² = 22/7 × 7 × 7 cm² = 154 cm²

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