150nm at original ground
speed (240kts) would take 37.5 minutes.
Aircraft has covered
150nm in 39.5 minutes = ground speed 228kts.
Remaining distance to run
is 480 – 150 = 330nm and at revised ground speed of 228kts this will take 86.8
minutes.
Total elapsed time = 39.5
+ 86.8 = 126.3 minutes (2h06m).
Departure time is 1000
add elapsed time 2h06m, ETA =
1206.