Sir give me the best solution for the question of class 10th ncert math of Applications of Trigonometry chapter of exercise 9.1 of question no.11, how i solve this problem in easy way 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 of the tower is 60°. From another point 20 m away from this point on the line joing this point to the foot of the tower, the angle of elevation of the top of the tower is 30° (see Fig. 9.12). Find the height of the tower and the width of the canal.