Respuesta :

2160 divided by 5.5 = 392.7 hopefully this is right!

Answer:

Hence, the average speed of the plane is:

                   392.7 miles/hour.

Step-by-step explanation:

The distance covered by a plane is: 2160 miles.

Also the time taken by the plane to cover this distance is: 5.5 hours.

Now, the average speed  of the plane is the ratio of the total  distance covered to the total time taken.

i..e

Speed=Distance/Time.

Hence,

[tex]Speed=\dfrac{2160}{5.5}\\\\\\Speed=392.7\ miles\ per\ hour[/tex]

                          Hence, average speed is:

                                  392.7 miles/hour