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[ABC" is a triangular park with "AB=AC=1...

[ABC" is a triangular park with "AB=AC=100m*ATV_(lg)],[" stands at the mid-point of BC.The angles of elevation "],[" the top of the tower at "A,B" ,Care "45^(@),60^(@),60^(@)" respective "],[" The height of the tower is "],[[" (a) "50m," (b) "50sqrt(3)m],[" (c) "50sqrt(2)m," (d) "50(3-sqrt(3))m]]

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