A bridge, in the shape of straight path, across a river, makes an angle of 60 with the width of
the river. If the length of the bridge is 100 metres, then the width of the river is
(A) 50 m (B) 173.2 m (C) 43.3 m (D) 100 m

let AB be the width of the river and AC be the bridge.

in the  triangle ABC,

hence the width of the river is 50 m.

  • 17

173.2b) 

  • -9

my answer is 50√3 m or 83.3 m.

  • -11
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