railway DFCCIL Executive 2025 Mock Test Surveying Traverse Surveying

एक रेखा AB का चुम्बकीय दिक्मान 132° 45' है। यदि चुम्बकीय दिक्पात 10° 20'W है, तो रेखा AB का  यथार्थ  दिक्मान होगा

1
122° 25'
2
143° 5'
3
121° 25'
4
122° 30'
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