Pratap rowed 18 miles down the Delaware River in 2 hrs., but the return trip took 4 1/2 hrs. Find the rate Pratap can row in both stillwater and current.
The part of the question 'stillwater and current' can be interpretted to ways:
1) The current is pushing him in the right direction getting him a time of 2 hours.
2) The current is pushing against him getting him a time of 4 and a half hours.
I would guess that the question is refering to the view 2. So all you have to do is 18m divided by 2hrs and 18m divided by 4 and a half hrs. Getting 9m/h for still water and 4m/h for fighting against the curent.