Two canoeists, A and B, live on opposite shores of a 300.0 m wide river that flows east at 0.80 m/s. A lives on the north shore and B lives on the south shore. They both set out to visit a mutual friend X who lives on the north shore at a point 200.0 m upstream from A and 200.0 m downstream from B. Both canoeists can propel their canoes at 2.4 m/s through the water. How much time must canoeist A wait after canoeist B sets out so that they both arrive at X at the same time? Both canoeists make their respective trips by the most direct routes.
delta v = delta d / delta t
The Attempt at a Solution
since the friend lives downstream from b i did 2.4 m/s - 0.80 m/s= 3.2 m/s. Then i rearranged v=d/t to t=d/t so 200 m/ 1.6 m/s = 125 seconds...
im struggling with canoe A since he has to go both down stream and across the river.. i have no idea how to do that. can you help me please?