An Airliner flies from LA to JFK in 5 hours. In the first 30 minutes the plane climbs to about 30,000ft. For the next 4 hours the plane flies at about 30,000ft. For the next 30 minutes the plane descends to JFK.
What % of the total fuel used for the flight is consumed in each of the 3 phases of the flight, i.e, the climb out, the cruise, the descent?