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Both circles have the same center. The circumference of the inner circle is 25.12 millimeters.
What is the area of the shaded region?
4 mm
C=25.12 mm
Use 3.14 for . Write your answer as a whole number or a decimal rounded to the nearest
hundredth.

Both circles have the same center The circumference of the inner circle is 2512 millimeters What is the area of the shaded region 4 mm C2512 mm Use 314 for Writ class=

Respuesta :

Answer:

Step-by-step explanation:

let r be radius of inner circle.

2πr=25.12

πr=25.12/2=12.56

3.14r=25.12

r=12.56/3.14=4

outer radius R=4+4=8 mm

reqd. area=πR²-πr²=π(R²-r²)=3.14(8²-4²)=3.14(64-16)=3.14×48= 150.72 mm²

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