Hi everyone, could you please help me out with this one?
At 07:33 you are 500 NM from Z.
ATC Request: do not cross Z before 08:57.
You are cruising at FL300, OAT -38°C, M.79, WC -70 KTS.
Calculate the latest time you can slow down to a GS of 320 KTS in order to comply with ATC.
Many thanks!