If the quadrantal bearing of a line is N 25° W, then the whole circle bearing of the line is?

Option 3 : 335°

Concept:

Whole circle Bearing system:

• In this system, the bearing of the line is measured from the north in the clockwise direction.
• Thus whole circle bearing system (WCB) of a line is the horizontal angle that the line makes with the north end of the reference meridian.
• The WCB of a line can vary from 0° to 360°.

Quadrantal Bearing system:

• The quadrantal bearing (QB) of a line is the acuate angle that the line makes with the meridian.
• Quadrantal bearing is measured either from the north end or south end as the case may be i.e. whichever is nearer to the line. The quadrantal bearing of a line can vary from 0° to 90° 

Conversion table for WCB and QB:

Calculation:

Given data, 

QB = N 25° W(In IV quadrant)

WCB = 360⁰ - 25^o = 335^o