I imagine you are more familiar (especially if you live anywhere but the states) with 200 km/ hour. I am very doubtful that any bird can keep that up for 4 hours. 200 km / hour is equal to about 125 miles / hour. There are few places that will allow a car to travel at that speed. You should be using km/hour because you (should) be more familiar with the units.
First find angle EBC. The are for a triangle is 180 degrees. It is a right triangle and has a right angle. 180 - (90 + 50) 180 - 140 angle EBC IS 40 NOW FIND X The line is 180 degrees. 180 -40 = 140 X = 140 DEGREES