Distance to PET  = D x H         Where D = 3,016nm    O =  480 – 90 = 390 kts

                             (O + H)                                           H = 480 + 75  = 555 kts

                                                                                    (O + H)           = 945

Distance to PET = 3,016 x 555 = 1771.3nm at 390 kts = 4 hrs 32 mins

                                    945

O/H ‘Q’ at 13:20 hrs + 4:42 = PET at 17:52 hrs