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A circus artist is climbing a 2 m long rope which is tightly stretched and tied from the top of a vertical pole of the ground. Find the height of the pole if the angle made by rope with ground is 30°.

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answer is B.

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Detailed Solution

Let height of pole is a m
We know that
Sin θ=

\frac{Perpendicular}{Hypotenuse}

Sin 30° =

\frac{a}{20}

\times

\frac{1}{2}

= a
a=10

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