Question

To the nearest 0.01 degree, what angle of descent (angle of depression) must a plane 50 horizontal miles from the airport and at an altitude of 20,000 feet make for it's final approach? -- I need the equation and the answer for this problem. thanks

Answer 1

20,000÷50=
$20000 \div 50 = 400ft$
The plane needs to descend at 400 ft per mile.

At 40 degrees?