The time that the plane will fly is:
3 hours and 26 minutes or 3.43 hours.
The speed of a plane is: 7 miles per minute.
Also, the plane will fly 8 trips, and each trip is 810 miles.
This means that the total miles that is traveled by the plane is:
8×180=1440 miles.
Now we are asked to find the time that the plane will take:
We know that:
[tex]Speed=\dfrac{Distance}{Time}[/tex]
Hence,
[tex]Time=\dfrac{Distance}{Speed}[/tex]
Hence, we get:
[tex]Time=\dfrac{1440}{7}\\\\i.e.\\\\Time=205.7143\ minutes[/tex]
which is approximately equal to 206 minutes
Hence, the answer is: 3 hours and 26 minutes or 3.43 hours.
