Two sectors each subtend an angle of at the centre of their respective circles

MATHEMATICS · Single correct · CBSE · Mathematics · Areas Related to Circles · Areas Related to Circles

Problem

Two sectors each subtend an angle of

90^{\circ}

at the centre of their respective circles. The radii of the circles are 6 cm and 9 cm. What is the ratio of their areas? (a)

9 : 4

(b)

4 : 9

(c)

8 : 27

(d)

2 : 3