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Posted by on Thursday, February 5, 2009 at 4:20pm.

A tunnel under a river is 196.8 ft below the surface at its lower point. If the angle of depression of the tunnel is 4.962 degrees, then how far apart on the surface are the entrances to the tunnel in feet? I have tan 4.962= 196.8/x but I think I did something wrong?! Thanks

  • Math - , Thursday, February 5, 2009 at 5:10pm

    I think you got the distance to the center of the river. Double your x.

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