A surveyor wants to know the length of a tunnel built through a mountain. According to her equipment, she is

A surveyor wants to know the length of a tunnel built through a mountain. According to her equipment, she is located 340 meters from one entrance of the
tunnel, at an angle of 58° to the perpendicular. Also aaccording to her equipment, she is 193 meters from the other entrance of the tunnel, at an angle of 21° to
the perpendicular. Based on these measurements, find the length of the entire tunnel.
Do not round any intermediate computations. Round your answer to the nearest tenth.
Note that the figure below is not drawn to scale.


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