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Solution of rectilinear figures, Mathematics
A straight line AB on the side of a hill is inclined at 15.0° to the horizontal. The axis of a tunnel 486ft. long is inclined 28.6° below the horizontal lies in a vertical plane with AB. How long is a vertical hole from the bottom of the tunnel to the surface of the hill?
Posted Date: 7/22/2012 3:25:54 AM  Location : United States
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