SSC SSC JE Civil 2025 Mock Test Series (Paper 1 & Paper 2) Surveying Compass Surveying and Theodolite

एक रेखा का चुंबकीय दिक्मान 135° 30' है। यदि अवनति 5° 15'W है तो वास्तविक दिक्मान क्या है?

1
140° 45'
2
120° 15'
3
115° 45'
4
130° 15'
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