The bearing of town B from town A is 070°. What is the back bearing of town A from town B?
Answer and explanation
Correct answer: A. 250°
- Step 1: To find back bearing: if the forward bearing θ < 180°, add 180° (back bearing = θ + 180°). Step 2. Substitute θ = 070°: 070° + 180° = 250°. Answer: 250°. Why not the others: 110° is 180° - 70°; 200° adds 130°; 290° is 360° - 70°.
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