Most important Height and Distance class X ques for Board Exam #cbseclass10 #maths #ssccgl #2023
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A 1.5 m tall boy is standing at some distance from a 30 m tall building. The angle of elevation from his eyes to the top of the building increase from 30
∘
to 60
∘
as he walks towards the building. Find the distance he walked towards the building.
The angle of elevation of an aeroplane from a point A on the ground is 60
∘
.after a fight of 30
∘
.seconds, the angle of elevation changes to. If the plane is flying at a constant height of 3600
3
.Find the speed in km/hr of the plane.
A round balloon of radius a subtends an angle α at the eye of the observer while the angle of elevation of its centre is β, then height of the center of the balloon is asinβcscα/2
If the angle of elevation of a cloud from a point 60 m above a lake is 30 and the angle of depression of its reflection in the lake be 60 .find the height of the cloud from the surface of the lake.