https://www.vedantu.com/question-answer/at-a-point-a-20-meters-above-the-level-of-water-class-10-maths-cbse-5f1d88c5fc7f314dfd207ddd
At a point A 20 meters above the level of water in a lake the angle of elevation of a cloud is 30circ The angle of depression of the reflection of the cloud in...
pointmeterslevel