The lower window of a house is at a height of 2m above the ground and its upper window is 4m vertically above the lower window. At certain instant the angles of elevation of a balloon from these windows are observed to be 60 degree and 30 degree respectively. Find the height of the balloon above the ground?
B is the lower window, and C is the upper window AB = FG = 2m, BC = EF = 4m , EC = FB,Let DE = x m
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