Question

Area of a sector of a circle of radius 15 cm is 30 cm² . Find the length of the arc of the sector.

Answer 1

Given: Radius (r) =15 cm, 

area of sector = 30 cm² 

To find: Length of the arc (l).

Area of sector = ((lengh of the arc) x radius)/2

∴ 30 = (l x 15)/2

∴ l = (30 x 2)/5 = 4cm

∴ The lenght of the arc is 4cm.