NCERT Exercise 9.1 - Q14 - Some Applications of Trigonometry
Question: A 1.2 m tall girl spots a balloon moving horizontally at a height of 88.2 m from the ground. The angle of elevation of the balloon is 60° at one instant and 30° later. Find the distance travelled by the balloon during the interval (see Fig. 9.13).
Answer: The balloon travelled 58sqrt(3) m during the interval.
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