Answers

2016-01-21T18:11:02+08:00
First, we need to know/find the circumference of both circles.

Circle with a diameter of 11 m. Given diameter:
C = πd
C = 3.14 (11 m)
C = 34.54 m 

Circle with a radius of 4 m. Given radius:
C = 2πr
C = 2 (3.14) (4 m)
C = 6.28 (4 m)
C = 25.12 m

Subtract.
34.54 m - 25.12 m = 9.42

Therefore, the answer to your question is 9.42
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2016-01-23T12:30:05+08:00
The formula of circumference is c=pi x diameter. so, the equation goes to; (11 x pi)-((4x2) x pi) which is 9.424777960769380
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