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[" 85.Consider a triangular plot "ABC" w...

[" 85.Consider a triangular plot "ABC" with sides "AB=7m" ,"],[BC=5m" and "CA=6m" .A vertical lamp-post at the mid "],[" point "D" of "AC" subtends an angle "30^(@)" at "B" .The height "],[" (in "m)" of the lamp-post is: "]

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