A river in the north-south direction has riverbandks that are straight , parallel to each other and separated by a distance of 140 m . The river flows from the north to the south at a velocity of 0.6m/s . A teenager stands at a point A on the west side of the riverbank , which is opposite to point B ont he east bank . C is a poiont that is 35 m to the south of B . The teenager can swim at a speed of 1.0m/s in calm water . If he wants to arrive at C , find the direction he should be heading .
Is B exactly opposite A ??