in still water, a speed boat travels 5 times faster than the current of the river. If the speed boat can travel 48 miles upstream and then back in 5 hours, find the rate of the current.

Answer 1

so it goes (5c - c) upstream
and (5c + c) downstream

t = d / r

5 = (48 / 4c) + (48 / 6c)

5c = 12 + 8