Emily Easygo can paddle her canoe at 8 m/s in still water.With this speed she then paddles upstream in a river that runs downstream at 6 m/s.Her friend sitting on shore sees her speed as
A)2 m/s.
B)6 m/s.
C)8 m/s.
D)10 m/s.

Question

Quizplus · Accepted Answer

When Emily paddles upstream against a current of 6 m/s with her own speed of 8 m/s in still water, her effective speed relative to the shore is the difference between these two speeds, which is 8 m/s - 6 m/s = 2 m/s.

Emily Easygo Can Paddle Her Canoe at 8 M/s in Still