railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Fitter Measurements

डिग्री के संदर्भ में \(\frac{{7\pi }}{9}\;radian\) का मान ज्ञात कीजिए। 

1
120
2
130
3
140
4
इनमें से कोई नहीं 
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