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Calculate the length of the arc of a cir...

Calculate the length of the arc of a circle of radius 31.0 cm which subtands and angle of `(pi)/(6)` at the centre.

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Radius, r= 31.0 cm
Angle, `theta= (pi)/(6)"rad"`
Since, `theta= ("Length of arc",L)/("Radius",r)`
`L= theta r`
`=(pi)/(6)r= (pi)/(6)xx31.0cm`
`=16.2 cm`
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