Answer these questions with working out. Thanks in advance 
6. A motor boat is travelling with a velocity of 20m/s in a direction of N.20.E relative to the water. The water however is streaming at 5.0m/s in a direction S.30.E. Determine the boat's velocity relative to the river bed.
7. An aeroplane pilot found that in order to fly over the ground in an easterly direction at 250.0km per hour, his air speed had to be 270.0 per hour in a direction E.5.N. Find the velocity of the wind which is blowing him off course.
8. A river is 350.0m wide and the stream in i flowing at 7.0m/s. In what direction relative to the stream would a boat need to travel if it was to reach the bank directly opposite the starting point in a time of 35.0s?
9. A cyclist riding due west at 30m/s felt a breeze in his face at 32.0m/s from a direction W.10.N. What was the velocity of the breeze relative to the ground?
10. Two aeroplanes flying a collision course are 10.0km apart. Areoplane A is flying at 500km per hour on a heading of N.30.E. Aeroplane B is flying at 600km per hour on a heading of W.30.N. If neither deviated from its course, how long would it take before they collided?
6. A motor boat is travelling with a velocity of 20m/s in a direction of N.20.E relative to the water. The water however is streaming at 5.0m/s in a direction S.30.E. Determine the boat's velocity relative to the river bed.
7. An aeroplane pilot found that in order to fly over the ground in an easterly direction at 250.0km per hour, his air speed had to be 270.0 per hour in a direction E.5.N. Find the velocity of the wind which is blowing him off course.
8. A river is 350.0m wide and the stream in i flowing at 7.0m/s. In what direction relative to the stream would a boat need to travel if it was to reach the bank directly opposite the starting point in a time of 35.0s?
9. A cyclist riding due west at 30m/s felt a breeze in his face at 32.0m/s from a direction W.10.N. What was the velocity of the breeze relative to the ground?
10. Two aeroplanes flying a collision course are 10.0km apart. Areoplane A is flying at 500km per hour on a heading of N.30.E. Aeroplane B is flying at 600km per hour on a heading of W.30.N. If neither deviated from its course, how long would it take before they collided?