From a point from the foot of a tower on level ground, the angle of elevation of the top is . Find the height of the tower.
Answer and explanation
Correct answer: B.
- Step 1: and .
- Step 2: So m.
Answer
.
Why not the others: is what you get if you double the distance. is what you get if you use . is what you get if you add the angle.
Practise more Geometry, Mensuration and Trigonometry.
Free questions with an explanation for every one, and full timed GCE O/L Mathematics (Sri Lanka) mock tests.
More Geometry, Mensuration and Trigonometry questions
- A right-angled triangle has perpendicular sides of and . Find the hypotenuse.
- Taking , find the area of a circle of diameter .
- Taking , find the volume of a cone with base radius and height .
- The bearing of from is . Find the bearing of from .
- Taking , find the curved surface area of a cone with base radius and vertical height .
- and are tangents from a point to a circle with centre , touching it at and . If , find…