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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 subtends an angle of `(pi)/(6)` at the centre.

Text Solution

Verified by Experts

Plane angle `theta=(l)/(r)` radian
`:.(pi)/(6)=(l)/(3l)( :. theta=(pi)/(6) and r=31 cm)`
`:.l=31xx(pi)/(6) cm=(31xx3.14)/(6) cm`
`16.22 cm`
By rounding off to three significant figures, it would be `16.2 cm`
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