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Four electricity posts, A,B,C, and D stand on a level ground such that B is 21m on a bearing of #060^0# from A, C, is 15 m to the south of B and D is 12 m on a bearing of #140^0# from A.
(a) (i) Using scale of 1 cm of I cm to represents 3 metres, draw a diagram to show the relative positions of the posts
(ii) Find the distances and the bearing of C from D
(b) The height of the post at A is 8.4m. On a separate scale drawing, mark and determine the angle of depression of the foot of the post at C from the top of the top of the post at A.