Subject :IMO Class : Class 8

A steamer goes downstream and covers the distance between two ports in 5 hours while it covers the same distance upstream in 6 hours. If the speed of the stream is 1 km/hr, find the speed of the steamer in still water.

A 12 km/hr

B 11 km/hr

C 13 km/hr

D 14 km/hr

explanation of this solution