A wire is tied to the top of a pole whose height is 15 meter and the wire makes an angle of 60° with the ground. The length of the wire is :एक खम्बे की ऊँचाई 15 मीटर है इसके ऊपरी सिरे से एक तार बंधा हुआ है, जो भूमि के साथ 60° का कोण बनाता है। तार की लम्बाई है :
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Correct answer: C. 10√3 meter10√3 मीटर
Explanation
sin 60° = height/length = 15/L, so L = 15/(√3/2) = 30/√3 = 10√3 m. The wire is 10√3 m long.sin 60° = ऊँचाई/लम्बाई = 15/L, अतः L = 15/(√3/2) = 30/√3 = 10√3 मी। तार की लम्बाई 10√3 मीटर है।More Mathematics & Numerical Ability questions
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