This is a standard Point of Equal Time question with a few extras!
We use the formula….Dist to PET = DH/O+H….but we have some wiz wheel work to do first.
Firstly convert CAS (RAS) to TAS…9000ft, ISA -10 (OAT-13)…TAS =213kts
Now we need the O and H (Onward and Homebound G/S)
Wind is 320/40, track out 350….O=178kts, H=249kts
So, Distance to PET = 350x249/(178+249) = 204nm
Time it takes = d/s = 204/178 =1.146hrs, or 69minutes.
1105 + 69 minutes = 1214.