Question 188932
Let x=speed of the canoe in still water
    x+6 = speed of the canoe going to the campsite
    x-6 = speed of the canoe returning from the campsite

Since distance=speed * time,

(x+6)*4=(x-6)*10

4x+24 = 10x-60

24+60=10x-4x

84=6x

x=14

The canoe travesl at 14kph in still water