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The radius of a circle field is 105 m. T...

The radius of a circle field is 105 m. The area obtained by a sector of angle `72^(@)` is used for paddy growing. The perimeter of the sector is ______.

A

132 m

B

342 m

C

210 m

D

173 m

Text Solution

Verified by Experts

The correct Answer is:
B
Given r = 105 m.
`"Length of the sector "(l)=(72^(@))/(360^(@))xx2xx(22)/(7)xx105`
`=44xx3=132m`
`"Perimeter of the sector"=l+2r=132+2xx105`
`=132+210=342m`
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