Q32 of 44 Page 9

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

Given:


Radius of circle R = 31.0 cm


Angle subtended by arc L =


We know that the angle θ subtended by an arc of length L at the centre of circle of radius R is given by




Therefore, the length of the arc is 16.23 cm


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(a) a physical quantity which has a unit but no dimensions.


(b) a physical quantity which has neither unit nor dimensions.


(c) a constant which has a unit.


(d) a constant which has no unit.


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