An airplane is spotted by two observers who are 1000 feet apart. As the airplane passes over the line joining them, each observer takes a sighting of the angle of elevation to the plane. One observes 40degrees, other 35degrees. How high is the airplane?
1 Answer
May 18, 2016
Explanation:
If PN is the ordinate from the plane on the line AB joining the observers and h is the height of the plane above AB,,
So,