Bob paddled his canoe12 miles upstream in hours. He reversed course and paddled downstream back to his starting point, in 1 hour. Assume Bob's rowing force and the current's speed are constant for the full trip.
A. What would be Bob's paddling speed in still water?
B. What us the soeed if the current?
(Remember the distance formula: d-rt Be sure to show all work)

Question

Bob paddled his canoe12 miles upstream in  hours. He reversed course and paddled downstream back to his starting point, in 1 hour. Assume Bob's rowing force and the current's speed are constant for the full trip. 
A. What would be Bob's paddling speed in still water?
B. What us the soeed if the current?
(Remember the distance formula: d-rt Be sure to show all work)

anonymous · Answer

Bob paddled his canone 12 miles upstream in 2 hours

phi · Answer

(Remember the distance formula: d-rt Be sure to show all work)
I assume you mean d= r*t   :  distance= rate * time
I would think his speed going upstream is slower than going downstream.
Call his speed r  and the current's speed c
then (r-c) is the speed going upstream  and (r+c) is the speed with the current.