Question 1077130
Let b be the speed of the boat in still water, and c be the speed of the current. Then:
48/b+c=4
48/b-c=6
So:
4b+4c=48
6b-6c=48
12b+12c=144
12b-12c=96
24b=240
b=10
c=2
The boat travels 10 kph in still water, and the current is 2 kph. ☺☺☺☺