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प्रश्न
A circus artist is climbing a 20 m long rope, which is tightly stretched and 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 level is 30°.
पर्याय
10 m
15 m
20 m
35 m
MCQ
उत्तर
10 m
Explanation:
Let AB be the vertical pole and CA be the 20 m long rope such that its one end is tied from the top of the vertical pole AB and the other end C is tied to a point C on the ground.
AC = 20 m be the rope which the circus artist is climbing,
`angle "ACB" = 30^circ`
In `Delta "ABC, sin" 30^circ = "AB"/"AC" = "h"/20`
`=> "h"/20 = 1/2 => "h" = 1/2 xx 20 "m" = 10 "m"`
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