The angle of elevation of a bird from a point 30√3 m from the straight line joining the bird to its reflection on a pond is 30°. Find the height of the bird (in m) hovering over the pond?
Answer & explanation
Correct answer: option 4
1 : \(\sqrt {3}\)
tan 30° = QR : PR
↓ ↓
↓ 30\(\sqrt {3}\)
30 × 1 = 30m