MathDB
circular pillar in a large circular room 2020 BMT Individual 19

Source:

January 6, 2022
geometrycirclesareas

Problem Statement

Alice is standing on the circumference of a large circular room of radius 1010. There is a circular pillar in the center of the room of radius 55 that blocks Alice’s view. The total area in the room Alice can see can be expressed in the form mπn+pq\frac{m\pi}{n} +p\sqrt{q}, where mm and nn are relatively prime positive integers and pp and qq are integers such that qq is square-free. Compute m+n+p+qm + n + p + q. (Note that the pillar is not included in the total area of the room.) https://cdn.artofproblemsolving.com/attachments/5/1/26e8aa6d12d9dd85bd5b284b6176870c7d11b1.png