Question 344640
let cabin speed be x mph
current  speed = y mph
..
speed downstream = x+y
distance = speed * time
48 = (x+y)*2
/2
24=x+y...................1
...
speed upstream = x-y
3*(x-y)=48
/3
x-y=12...................2add 1&2
2x= 24+12
2x=36
/2
x=18 mph 
..
x+y=24
x=18
y=6 mph speed of current