A wire in the shape of a sector of angle 210° is bent to form a full circle. What is the ratio of areas enclosed by the sector and circle?
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Hi! mate!
Area of sector (A1)=πr²(210)/360
Area of circle (A2)=πr²
Ratio
A1/A2=21/36
Area of sector (A1)=πr²(210)/360
Area of circle (A2)=πr²
Ratio
A1/A2=21/36
siv732001:
But in the answer key it's given 21π^2:289
Maybe coz radius changes since length of wire is constant
Can you check?
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