Question

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

(i) Area of Ring:

(ii)
Perimeter of Ring:

Answer 1

Answer:

Step-by-step explanation:

A=a*b

A=7*14

A=98

p=A+B+A+B

P=7+14+7+14+7=

P=42

Answer 2

Answer:

154 cm²

Step-by-step explanation:

Circumference of circle = 2πr

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

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

Area of circle = πr²

Area of circle = πr² = 22/7 × 7 × 7 cm²

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

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