Two rowers, who can row at the same speed in still water, head across a river. . . The first rower (Alice) heads straight across (but of course her boat is pulled downstream by the current). . . The second rower (Bianca) heads slightly upstream, so that with the pull of the current she arrives directly opposite their starting point. . . Who arrives at the other side first?. . A) Alice. B) Bianca. C) It's impossible to tell without more information.
