document.write( "Question 1110603: a pilot flying at 4000 ft approaches a runway and determines that the angles of depression to either end of the runway are 10 degrees and 6 degrees 40' find the length of the runway. \n" ); document.write( "

Algebra.Com's Answer #725601 by Boreal(15235) $\"\"$ $\"About$

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Draw this and there are right triangles, both with one leg 4000' long and the opposite angle the opposite to the depression or elevation to the plane.
\n" ); document.write( "Tangent of 10=4000/x
\n" ); document.write( "x=4000/tangent 10=22685 feet
\n" ); document.write( "x=4000/tangent 6.67=34222 feet
\n" ); document.write( "The runway is 11,537 feet long
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