Q. 333.6( 13 Votes )
A man sitting at
Let width of the river be DC= DB+BC ⇒ ) m.
tan 60° =
20 = √3
Now in ∆ABD
tan 30° =
Therefore width of river = ) m.
⇒ ⇒ ⇒ m.
Width of river is m.
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