The angles of elevation of a flying kite at three points, A,B,C on a horizontal line (lying in the same vertical plane with the kite) are in the ratio 1:2:3 if AB=a,BC=b then the height of the kite is
A
a2b√(a+b)(3b−a)
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B
ab√(a−b)(3b+a)
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C
2ab√(a−b)(3b+a)
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D
ab√(a−b)(3b−a)
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