A plane flies 457 km east from city A to city B in 41.0 min and then 949 km south from city B to city C in 1.30 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the plane's displacement, the (c) magnitude (in km/h) and (d) direction of its average velocity, and (e) its average speed (in km/h)? Give your angles as positive or negative values of magnitude less than 180 degrees, measured from the +x direction (east).
The Attempt at a Solution
457cos(0) + 949sin(270)
= 457i + -949j
arctan(-949/457) = -64.29 degrees
I am not sure if either of those are correct and as for the rest of the problem I need help on how to solve for those things.