# Civil Engineering - UPSC Civil Service Exam Questions - Discussion

8.

A and B are two traverse stations free from local attraction errors. If the true bearing of a line AB is 89°, and the magnetic declination at point A is 1° West, then the magnetic bearing of the line BA would be

 [A]. 88° [B]. 90° [C]. 268° [D]. 270°

Answer: Option B

Explanation:

No answer description available for this question.

 Vipul said: (Nov 24, 2016) The answer should be 270°.

 Ramya said: (Jul 13, 2017) But how? Explain.

 Roy said: (Jul 21, 2017) Magnetic bearing of AB=89+1=90. So magnetic bearing of BA=90+180=270.

 Sam said: (May 11, 2018) Yes, 270° is the correct answer.

 Sandeep Kumar said: (Jul 23, 2018) Yes 270° is the correct answer.

 Md Aqeel Ahmed said: (Feb 23, 2019) MB of AB = 89-1 =88 (1° West). Bearing of BA = 88+180= 268. West means -. East means +.

 Bongil said: (Dec 4, 2020) Magnetic bearing = true bearing +declination. = true bearing + declination. = 89+1= 90°.

 Balvinder Guleria said: (Jan 14, 2021) True bearing of AB=89° BA = 180 + 89 = 269, Megnetic declinations=1w(-ve). TB = MB-MD. 269°= MB-1, MB = 269 + 1, MB = 270°.

 Vivek said: (Apr 10, 2021) 268° is the correct answer.

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