need help to figure this out
An aircraft leaves A at 1400, flying at Mach 0.84 (OAT – 58° C). The ETA B is 1436 and the distance between A and B is 300 nm. At what time must a speed adjustment be made if the arrival time is changed to 1438:
A) 1426.5
B) 1427.5
C) 1428.5
D) 1425.5
correct answer is d ...
i have been able to figure out the true TAS=480 and the planned TAS =500
what to do next...is whats bugging me i tried all the speed and time stuff i knew but its confusing the living daylights outta me