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S O B A The figure above, not drawn to scale, shows a vertical pole, AB, standing on horizontal ground. SOA is a straight

S O B A The figure above, not drawn to scale, shows a vertical pole, AB, standing on horizontal ground. SOA is a straight line on the horizontal ground. From S and O the angle of elevation of B are 30 and 50 respectively. The distance from S to B is 50 metres. Calculate, correct to 2 decimal places, the height in metres of AB. (4 marks)

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