A canoeist paddles 27 miles upstream against the current . The current is 2 mph and he is paddling 5 mph.

It would take him ???? hours to complete this upstream journey

Question

A canoeist paddles 27 miles upstream against the current . The current is 2 mph and he is paddling 5 mph.

It would take him ????   hours to complete this upstream journey

anonymous · Answer

His effective speed is 3 mph.  (His speed - resistance)  -->(5-2=3) therefore, to go 27 miles divide the distance by the speed.  27/3=9.  9 Hours.

anonymous · Answer

The current is holding him back so even tho he is paddling 5 mph the current is taking away 2 mph so he is only gaining 3 mph

d = rt
27 = 3t 
t = 9 hours

anonymous · Answer

..thanks!!