sir this is the important question from the book -ML aggarwal( avichal publication) class 10th , chapter20 , heights and distances
it is given that An aircraft is flying at a constant height with a speed of 360 km/h.
From a point on the ground,
the angle of elevation of the aircraft at an instant was observed to be 450.
After 20 seconds, the angle of elevation was observed to be 300.
Determine the height at which the aircraft flying. (use √3 = 1.732)
question no 38 , heights and distances , ICSE board, ML Aggarwal