CBSE Class 10-Mathematics: Chapter –9 Some Applications of Trigonometry Part 7
Get top class preparation for CBSE right from your home: fully solved questions with step-by-step explanation- practice your way to success.
Question 8:
A round balloon of radius r subtends an angle at the eye of the observer while the angle of the elevation of its center is . Prove that the height of the center of the balloon is .
A Round Balloon of Radius
Loading image•••
Answer:
In right
In right ,
Question 9:
An aeroplane flying horizontally 1 km above the ground is observed at an elevation of . After seconds, its elevation is observed to . Find the speed of the aeroplane in .
An Aeroplane Flying Horizontally
Loading image•••
Answer:
In right ,
In right
Speed