1. The problem statement, all variables and given/known data There's a 100m wide river, with a current of 8.5 m/s going 45 degrees SE. You and a friend are standing directly opposite each other across the river, the friend on the north side, you on the south side. You each get in boats that travel 7 m/s relative to the water and head out directly north/south. a. What is your friends speed relative to you? ....... d. How long does it take to cross the river? 2. Relevant equations 3. The attempt at a solution Just looked over briefly at some of them, can someone verify if these look correct? A is 14 m/s D Since you will be traveling 1 m/s north (the current vector will push 6 m/s down on you), it will take 100 s to cross it.