Question

an aeroplane , flying horizontally 1000m above the ground, is observed at an angle of elevation 60° from a point on the ground. After a flight of 10 seconds the angle of elevation at the point of observation changes to 30°. Find the speed of the plane in m/s. (take: root3 = 1.732).​

Answer 1

Answer:

173.2 m/s

Step-by-step explanation:

1000/d+l = 1/√3

1000/l = √3

d+l/l = 4 , d = 3l = 3x1000/√3 = 1000√3

speed = 1000√3/10 = 100√3 = 173.2 m/s

Answer 2

$\huge{\textbf{Solution is attached here for you.}}$