# An umbrella has 8 ribs which are equally spaced (see figure). Assuming umbrella to be a flat circle of radius 45 cm, find the area between the two consecutive ribs of the umbrella.

= $$\frac{1}{8}^{th}$$ times the Total Area of the umbrella
$$= \ \frac{1}{8} \ × \pi r^2$$ ,where $$r \ = \ 45$$cm
$$= \ \frac{1}{8} \ × \ \frac{22}{7} \ × \ (45)^2 \ = \ \frac{22275}{28}$$ cm2