MathDB

055

Part of 1940 Moscow Mathematical Olympiad

Problems(1)

MMO 055 Moscow MO 1940 days a raft floats the river

Source:

7/18/2019
It takes a steamer 55 days to go from Gorky to Astrakhan downstream the Volga river and 77 days upstream from Astrakhan to Gorky. How long will it take for a raft to float downstream from Gorky to Astrakhan?
timealgebra