In Figure-3, a tightly stretched rope of length 20 m is tied from the top of a vertical pole to the ground. Find the height of the pole if the angle made by the rope with the ground is $30°$.

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Question

In Figure-3, a tightly stretched rope of length 20 m is tied from the top of a vertical pole to the ground. Find the height of the pole if the angle made by the rope with the ground is $30°$.

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Accepted Answer

Step 1: $\sin 30° = \frac{AB}{20} \Rightarrow AB = 20 	imes \frac{1}{2} = 10$ m

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