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A 1.2m tall girl spots a balloon moving with the wind in a horizontal line at a height 88.2 m from the ground. The angle of elevation of the balloon from the eyes of the girl at any instant is 60°.After sometime, the angle of elevation reduces 30°.Find the distance travelled by the balloon during the interval.

 

Question 34 (Choice 2) - CBSE Class 10 Sample Paper for 2021 Boards -

 

This question is exactly same as Ex 9.1, 14 of Chapter 9 Class 10 in the NCERT Book.

Please check the answer and video here

https://www.teachoo.com/1814/535/Ex-9.1--14---A-1.2-m-tall-girl-spots-a-balloon-moving-with-wind/category/Ex-9.1/

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Transcript

Question 34 (Choice - 2) A 1.2m tall girl spots a balloon moving with the wind in a horizontal line at a height 88.2 m from the ground. The angle of elevation of the balloon from the eyes of the girl at any instant is 60°.After sometime, the angle of elevation reduces 30°.Find the distance travelled by the balloon during the interval.

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.