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 5000 kilometers?

Well, we don't actually know where its destination is,
so we can't answer the letter of the question.

All we can offer is the time it takes the airplane
to cover the 5,000 km.

               Time = (distance) / (speed)

                       = (5,000 km) / (790 km/hr)

                       = (5,000 / 790)  hr

                       =    6.33 hours

                           (6 hours  19 minutes  44.8 seconds)

Ithink it’s cancer risk