The angle of depression of a point situated at a distance

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The angle of depression of a point situated at a distance of 70 m from the base of a tower is 60°. The height of the tower is :

AB = Tower = h metre (let)
∠DAC = ∠ACB = 60°
BC = 70 metre
In ∆ABC,

tan 60° =	AB
	BC

⇒ √3 =	h
	70

⇒ h = 70 √3 metre

	70√3	m
	3