A man standing on the bank of a river observes the top of a tree on the opposite bank at an angle of elevation of 60°. After moving 20m back, the angle becomes 30°. What is the height of the tree?
Q1. A man standing on the bank of a river observes the top of a tree on the opposite bank at an angle of elevation of 60°. After moving 20m back, the angle becomes 30°. What is the height of the tree?
Answer: 17.32 m
Explanation: Let height = h. Using tan(60°) = h / x and tan(30°) = h / (x + 20), we can solve for h.