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 increases from $3 0^{\circ}$ to $6 0^{\circ}$ as he walks towards the building. Find the distance he walked towards the building.

Practise more Geometry and Trigonometry.

Free questions with an explanation for every one, and full timed CBSE Class 10 mock tests.

All Geometry and Trigonometry questions Take a mock test

More Geometry and Trigonometry questions

In $△ A B C$ , $D E ∥ B C$ such that $D$ is on $A B$ and $E$ is on $A C$ . If $A D = 3 cm$ , $D B = 5 cm$ , and…
A line segment $A B$ has endpoints $A (- 2, 8)$ and $B (- 6, - 4)$ . What are the coordinates of the midpoint of $A B$ ?
From an external point $P$ , two tangents $P A$ and $P B$ are drawn to a circle with centre $O$ . If $∠ A P B = 7 0^{\circ}$ , what is the measur…
If the perimeter and the area of a circle are numerically equal, what is the radius of the circle?
What is the distance between the points $P (2, - 3)$ and $Q (10, 3)$ ?
If $tan θ + cot θ = 2$ , where $0^{\circ} < θ < 9 0^{\circ}$ , what is the value of $tan^{7} θ + cot^{7} θ$ ?

Revise with flashcards

A 1.5 m tall boy is standing at some… | CBSE Class 10