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यदि एक पेंडुलम `30^(@)` के कोण पर घूमते हुये 8.8 सेमी. लम्बाई का चाप बनाता हो, तो पैंडुलम कि लम्बाई ज्ञात कीजिए `(pi=22//7)`

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यदि एक पेंडुलम `30^(@)` के कोण पर घूमते हुये 8.8 सेमी. लम्बाई का चाप बनाता हो, तो पैंडुलम कि लम्बाई ज्ञात कीजिए `(pi=22//7)`
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दिया है : `theta=30^(@)`, l = चाप = 8.8 सेमी.
`:." "l=(theta)/(360^(@))xx2pirimplies8.8=(30)/(360)xx2xx(22)/(7)xxrimpliesr=(8.8xx6xx7)/(22)` सेमी. = 16.8 सेमी.
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