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Question

# In a badly maintained field book, following observations were found: Bearing of line AB with true north =123∘ Acute angle ABC=82∘ When extended line BC is rotated by an angle of 30∘(clockwise), it meets the line CD. If the bearing of line DC with true North is more than 180∘, then its bearing value (in degrees) is

A
305
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B
None of these
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C
235
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D
55
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Solution

## The correct option is C 235 ∠CBB′=180∘−82∘=98∘ Bearing of line BC with True North =123∘−98∘=25∘ Bearing of line CD with True North =25∘+30∘=55∘ Bearing of line DC with True North =180∘+55∘=235∘

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