**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**

Modified on: Tue, 12 Oct, 2021 at 2:14 PM

**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**

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