Concept: The question tests on the basics of Geometry
Solution:
If θ is the central angle subtended by the 2 ends of the Arc.
Area of a sector = θ/360∗π∗r^2
40π=θ/360∗π∗10^2
θ=144
Arc Length = θ/360∗2π∗r=144/360∗2∗π∗10=8π
Option D
A sector of a circle has an area of 40π and a radius Print
Modified on: Tue, 12 Oct, 2021 at 2:14 PM
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