A man wants to row shortest possible distance from north to south across river which is flowing at 4 km/hr from east. He can row at 6 km/hr. (a) In which direction must he steer? At the angle (in degrees) of_______ west/east of south.
(b) Assume that when man is in middle of river, a wind of 6 km/hr from southwest starts. In which direction must he steer to move straight across river? Which bank of river will rower reach first? i. North ii. South iii. Neither