Heights and Distances ( Part 6) Some Applications of Trigonometry | CBSE | Class 10 | Math Shiksha Abhiyan

Q5. A 1.5 m tall boy is standing at some distance from a 30 m tall building. The angle of elevation from his eyes to the top of the building increases from 30° to 60° as he walks towards the building. Find the distance he walked towards the building.

Q4. A boy standing on a horizontal plane fmds a. bird flying at a distance of 100 m from him at an elevation of 30°. A'girl standing on the roof of a 20 m high building, finds the angle of elevation of the same bird to be 45°. The boy and the girl are

Q3. The angles of elevation of the top of a tower from two points on the ground at distances a metres and b metres from the base of the tower and in the same straight line are complementary. Prove that the height of the tower is VAB, metres.

Q2. A person standing on the bank of a river observes that the angle of elevation of the top of a tree standing on the opposite bank is 60°. When he moves 30 m away from the bank, he fmds the angle of elevation to be 30°. Find the height of the tree a

Q1. A tree breaks due to storm and the broken part bends so that the top of the tree touches the ground making an angle of 30°with it. The distance between the foot of the tree to the point where the top touches the ground is 9 m. find the height of th