Question

In the figure, the area of shaded portion is 770cm2. if the circumference of the outer circle is 132cm, find the width of shaded portion
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Answer 1

Answer:

Circumference = 132

2piR=132

piR=66

R=21.01 cm

Now , width = R - r

We know that piR^ - pir^ = 770 cm^ as stated in the question

Step-by-step explanation:

1387.32 - 22/7r^ = 770 cm^

1387.32 - 770 = 22/7r^

617.32 cm^ = 22/7r^

617.32*7/22 == r^

196.42 cm^ = r^

r = 14.01 cm

Witdh = R - r

21.01 - 14.01 = 7 cm

Therefore the width of shaded portion will be 7 cm

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