Question

A riverboat crosses the river going due north at 8m/s crosses a river going due east at 6m/s. If it takes the boat 18s to cross the river, how far downstream did the boat drift?

Answer 1

$v_n = 8 m/s$      $v_e = 6m/s$           $t = 18s$

$S = vt = \sqrt{v_n^2+v_e^2} t = \sqrt{8^2+6^2} * 18 = 180m$