32. Calculate the length of the arc of a circle of radius 31.0 cm which subtends an angle of π/6 at the centre.

Hint: Angle=arcradius
Step 1: Find the length of the arc.

 We know that angle θ=lr radian  Given, θ=π6=l31 Hence,  length =l=31×π6cm=31×3.146cm=16.22cm

Rounding off to three significant figures it would be 16.2 cm.