Angle Q is 62° and angle R is 70°, so angle P is 48°.
Use the Law of Sines:
(p is side QR and r is side PQ)
Plug the numbers in:
and solve for p.
Two electricity pylons P and Q are 550m apart on the same side of a river. A third pylon R is on the other side of the river. Angle RQP is 62° and Angle QRP is 70°. Find by calculation the distance from R to Q to the nearest metre