Question 1189340
the plane uses 600 gallons per minute at 600 miles per hour and 500 gallons per minute at 500 miles per hour.


there are 60 minutes in an hour


the plane uses 600 * 60 = 36000 gallons per hour when the plane is traveling at 600 miles per hour.
the plane uses 500 * 60 = 30000 gallons per hour when the plan is traveling at 500 miles per hour.


the plane flies at 600 miles per hour for 3 hours.
the total number of miles traveled is 3 * 600 = 1800 miles.
the total number of gallons used is 3 * 36000 = 108000 gallons.


the plane flies at 500 miles per hour for 2 hours.
the total number of miles traveled is 2 * 500 = 1000 miles
the total number of gallons used is 2 * 30000 = 60000 gallons.


the plane flew a total of 2800 miles and used a total of 168000 gallons.
the average number of gallons per mile used by the plane was 168000 / 2800 = 60.