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[" Consider a triangular plot "ABC" with...

[" 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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