Question

An arc of lenght 28m subtends an angle of 24 at the centre of a circle.In the same circle,what angles does an arc of lenght 35m subtend?

Answer 1

arc length is proportional to the angle.
So you have proportion
θ/35 = 24/28

Answer 2

What angle does an arc 5.5cm in length subtends at the centre of a circle of radius 1/2m?