Hello, Sohail,

1. Draw a sketch of the described situation (see attachment)

2. Bearings are measured from the North clockwise. So N = 0°, E = 90° etc.

3. You have a triangle QPR. You know all three angles and one leg. So use Sine rule to calculate the line PR:

4.

5. Use Sine rule:

. Solve for PR.

I've got:

EB