The penguins are trapped in Madagascar after their plane crashed, but since they are very intelligent and with the help of monkeys they manage to repair it, after a long time they manage to take off the plane and start their flight, they have a constant speed of 350km/h, everything was going well until the middle of the route, and at their highest point of the route at 12,800 meters above sea level, the engines exploded and began to fall at a speed of 400 km/h, falling 1000 km from where they took off. What is the equation?

I keep in mind that a parable is formed.