Ship A is located 4 km north and 3 km east of ship B. Ship A has a velocity of `20 kmh^-1` towards the south and ship B is moving at `40 kmh^-1` in a direction `37^@` north of east. X and Y-axes are along east and north directions, respectively

At 10.a.m.., a ship A is at 40 km to the east of a ship B . Ship A moves at 12 km per hour towards west and ship B moves at 16km*h^(-1) towards south. When will the distance between them be minimum and what will be the value of this minimum distance ?

Ship A is 10km due west of ship B. Ship A is heading directly north at a speed of 30 kmph while ship B is heading in a direction 60° west of north at a speed 20kmph. Their closest distance of approach will be........