college math
posted by victor on .
boat travels 160 miles downstream in the same time that it takes to go 96 upstream. the pead of the stream is 6 mph. what is the speed of still water

v = boat speed
speed downstream = (v + 6)
speed upstream = (v6)
time = distance/speed
160/(v+6) = 96/(v6)
10/(v+6) = 6/(v6)
5/(v+6) = 3/(v6)
3(v+6) = 5(v6)
3 v + 18 = 5 v  30
2 v = 48
v = 24 mph