MathDB

B3

Part of Putnam 1938

Problems(1)

Putnam 1938 B3

Source:

8/20/2021
A horizontal disk diameter 33 inches rotates once every 1515 seconds. An insect starts at the southernmost point of the disk facing due north. Always facing due north, it crawls over the disk at 11 inch per second. Where does it again reach the edge of the disk?
Putnam