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If the length of an arc of sector of a c...

If the length of an arc of sector of a circle is 20 cm and if its radius is 7 cm, find the area of the sector.

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The correct Answer is:
Area of sector = `70 cm^(2)`
Length of an arc = l = 20 cm
its radius = r = 7 cm
Area of sector (A) `= (r )/(2) xx l`
` = (7)/(2) xx 20`
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