Physics

Problem

A boat can travel at

10\,\text{m/s}

in still water. The river flows at

6\,\text{m/s}

. The boat driver steers at an angle of

37^{\circ}

upstream from the line perpendicular the bank (i.e., angle with bank is

53^{\circ}

). If the river is

400\,\text{m}

wide, calculate the time taken to cross the river.