Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Twenty meters of wire is available for fencing off a flower-bed in the form of a circular sector. Then the maximum area (in sq. m) of the flower-bed, is :
Text Solution
Verified by ExpertsThe correct answer is:
C
2r + λ = 20 ⇒ 2r + r θ = 20 ⇒ θ = 
A = 
= 
. 
= r(10–r)
A = 10r – r 2
= 10 – 2r = 0 ⇒ r = 5
∴ θ = 
= 2
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