How much time would it take for an airplane to reach its destination if it traveled at an average speed of 790 km/hr for a distance of 4,700km?
also, if the airplane then turns around and returns to its original gate, what is its velocity?

Time = (distance) / (speed)  =  (4,700 km) / (790 km/hr)  =  5.95 hours

Velocity =

           (distance from the start-point to the end-point)
divided by
           (time for the trip) .

If the airplane went 4,700 km away, then turned around and returned
to its starting point, then the distance from the start-point to the end-point
is zero, and the average velocity for the trip is zero.

Ithink the answer is c but then again i'm probably wrong