In a circle of diameter 48cm,if an arc subtends an angle of 120' at the centre where I1=22/7, then
what will be the length of arc.
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2
Answer:
⇒ θ=30
o
and r=4cm
⇒ Length of an arc =
360
o
θ
(2πr)
Where, θ is angle subtended at a center.
2πr is circumference of a circle.
⇒ Length of an arc =
360
o
30
o
×2π×4
⇒ Length of an arc =
12
2π×4
∴ Length of an arc =
3
2π
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