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L/(L-85) = tan60/tan30 = 3 (L = initial distance of man from base of tower)

L = 3L-255 so 2L = 255 and L = 127.5 giving height = 127.5 tan30 = 73.6 m

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Q: A man finds the angle of elevation of the top of a tower to be 30 degrees He walks 85 meter nearer the tower and finds its angle of elevation to be 60 degrees What is the height of the tower?
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