Question

aeroplane takes off at an angle 30 degree with horizontal ground travelling at a speed of 180 km per hour if it is continue to fly with the same velocity in the same direction how long will it take to reach in altitude of 9 km above the ground​

Answer 1

Answer: 360 s

Explanation:

Firstly,

speed of aeroplane along 30° with the horizontal is 180km/h = 180*5/18=50m/s

Speed of aeroplane along vertical direction = 50 sin(30°)=25m/s

Vertical distance to cover by aeroplane = 9km = 9000m

Hence,

$S_y=u_y*t\\ \\=>9000 = 25*t\\ \\t = 360s$

Hence, time taken by aeroplane to cover altitude of 9 km is 360s