This should get you started
https://www.jiskha.com/questions/1826597/an-aeroplane-leaves-an-airport-flies-due-north-for-2hrs-at-500km-h-it-then-flies-on-a#2023378
An airplane leaves an airport,flies due north for 2 hours at 500 km/h. It then flies on a bearing of 53 degree at 300 km/h for 90 minutes. Find the bearing of the plane from the airport. If it takes the airplane 150 minutes to fly back to the airport,find the average speed of the airplane for the whole flight
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