NCERT Exercise 9.1 - Q11 - Some Applications of Trigonometry
Question: A TV tower stands vertically on a bank of a canal. From a point on the other bank directly opposite the tower, the angle of elevation of the top is 60°. From another point 20 m away from this point on the line joining this point to the foot of the tower, the angle of elevation is 30° (see Fig. 9.12). Find the height of the tower and the width of the canal.
Answer: Height of tower = 10sqrt(3) m; width of canal = 10 m.
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