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प्रश्न
A sector is cut from a circle of radius 21 cm. The angle of the sector is 150°. Find the length of the arc and the area of the sector.
बेरीज
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उत्तर
Given:
Radius = 2 cm
Angle of sector = 150°
Now,
Length of the arc`= (2pi"r"theta)/360`
`=(2xx22/7xx21xx150)/360`
= 55 cm
Area of the sector `= (pi"r"^2theta)/360`
`= 22/7xx21xx21xx150/360`
= 577.5 cm
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