Jeremy can row downstream on a river for 5km in 2hrs, while it takes him 4hrs to return to his starting point (meaning the motion is upstream). What is Jeremy's Average spee (in km/hr ) for the whole trip?

THANKS!!!!

Question

Jeremy can row downstream on a river for 5km in 2hrs, while it takes him 4hrs to return to his starting point (meaning the motion is upstream). What is Jeremy's Average spee (in km/hr ) for the whole trip?


THANKS!!!!

solomonzelman · Answer

the trip is the same distance there and back. e.i. 5 miles.

So on the way there,   5 miles in 2 hours     2.5 mph
On the way back,       5 miles in 4 hours     1.25 mph

anonymous · Answer

So what's the value in km/h? :)

solomonzelman · Answer

On this website we give guidance and tips, not straight answer. Also, I am afraid to be suspended.