A town Q is on bearing of 210 from P,R is another town on a bearing of 150 from P east of Q.the /RP/=10,find d /RQ/...

Answer 1

I have triangle PQR, with angle P = 60° and RP = 10

not enough information.

Answer 2

triangle PQR is isosceles, since QR runs east-west.
In addition, PQR is equilateral, so RQ=RP=10