Answer:the trip out took 7 hours
Explanation:
Distance travelled = speed × time
Let t represent the time it took the plane to travel from California.
It took one hour on the way out than it did on the way back. This means that the time it took the plane to return would be t - 1
The plane's average speed out ward 300 mph. Distance travelled when going out would be
300 × t = 300 = 300t
The speed on the way back was 350mph. Distance travelled when returning would be
350(t - 1) = 350t - 350
Since the distance is the same, it means that
300t = 350t - 350
350t - 300t = 350
50t = 350
t = 350/50 = 7
Time taken to go out is 7 hours