Question

- In two circles, arcs of equal length subtend 60° and 30° at
their centres, then the their radii are in ratio:
(A) 2:1
(B) 1:2
( 1:1
D) None of these​

Answer 1

Answer:

Arc=X/36ox2 πr

6o/360 x2πr 1=30/360x2πr 2

ri/r2=30/360x2π/60/360x2π

r1/r2=30/60

r1/r2=1:2

ratio of radii=1:2