Aboat traveled 60 miles downstream and back. the trip downstream took 3 hours. the trip back
took 6 hours. find the speed of the boat in still water and the speed of the current.

The trip back the boat will travel only 30 miles because the trip doubled the hrs.

In still water it takes him 3 hours to travel 30 miles.
That is 10 m/h
Going back it took him 6 hours which means he travelled at 5 m/h.
To slow him done by 5 m/h the current had to flow at 5 m/h

Hope this helps :)

Iwould think that the correct answer is 8.1