Given: The height of the tower is 30 m and the length of shadow from the foot of the tower is 30√3 Concept used: tanθ = P/BP → Perpendicular B → Base Calculation: Let the height of the tower is PQ and the length of the shadow is QR So, we can consider the right angle at Q where R is the angle of elevation
Now, in triangle PQR⇒ tanR = PQ/QR ⇒ tanR = 30/30√3 = 1/√3 We know that the value of tan 30° is 1/√3 ∴ tanR = tan30° ⇒ R = 30° ∴ The angle of elevation is 30°