If a plane travels 13 miles in one minute, in an hour, it will have traveled 780 miles. The trips the plane takes are 768 miles, and the plane takes the trip six times. multiply the miles of the trip by the amount of trips. 768 x 6 = 4,608. It will take 5 - 5 1/2 hours to make the trips.
13 miles per minute 13 miles x 60 min=780 miles per hour 768 miles x6 trips=4608 miles 4608:780=5.9 hours The plane will fly 5.9 hours