"If "ABC" is a triangle in which "B=45^(...

`"If "ABC" is a triangle in which "B=45^(0),C=120^(@)" a "=40" ,the length of the perpendicular from "A" on "BC" produced is ( A) "20(3-sqrt(3))" (B) "20(3+sqrt(3))" (C) "20(sqrt(3)+1)" (D) "20(sqrt(3)-1)"`

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