In this question, it is given that
Circle Q and circle R have a central angle measuring 75°. The ratio of circle Q's radius to circle R's radius is 2:5.
And the formula of area of sector is

And the radius are in the ratio 2:5.
Let the radius are 2x and 5x. SO area of sectors are

And the ratio is


So for the ratio of the area of sectors of circle R to Q, it is
