Questions
The angle of elevation of an object from a point P on the level ground is . Moving d meters on the ground towards the object, the angle of elevation is found to be . Then the height (in meters) of the object is
detailed solution
Correct option is D
tanα=hx+d⇒x+d=hcotαtanβ=hx⇒x=hcotβ∴ x+d−x=h[cotα−cotβ]⇒h=dcotα−cotβTalk to our academic expert!
Similar Questions
The angle of elevation of top of an unfinished tower at a point distance 120m from its base is 450. How much height must the tower be raise so that angle of elevation of top at the same point to be 600.
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