Question

A boat propelled so as to travel with speed 0.50m/s in still water, move directly across a river that is 60m wide. The river flows with speed of 0.30m/s. At what angel does the boat point to?

Answer 1

$\alpha=\tan^{-1}(0.5/0.3)=59°$ relative to the velocity of the river

$l=60/\tan59°=36.1\ (m)$ downstream