Question

please help me to solve this question​

Answer 1

Answer:

Step-by-step explanation:

area of circle=πr²

r of inner circle is 21-7=14m

area=22/7 x 14 x14=22x2x14=44x14=616m²

r of outer circle=21m

area=22/7 x 21x21=22x3x21=66x21=1386m²

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Answer 2

Answer:

Circumference of inner circle= 88 m

Circumference of outer circle=132 m

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