A Canoe Club Plans a return trip on a river flows at an average speed of 1.5 Km h–1 . The canoeists will first paddle their canoes up stream for 6 Km, then return. The ladder estimates that the group can paddle at an average speed of 4.5 Km h–1 on still water.
(a) How long should the leader expect the trip to last, ignoring any stops for rest or refreshment?
(b) What is the group’s (expected) average speed for the journey.
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