Final answer:
A jumbo jet typically gets around 90 miles per gallon per seat, and the energy required to fly a plane from point A to point B is relatively consistent regardless of passenger load. It's worth noting that fuel needs for space travel are much higher than for cars.
Step-by-step explanation:
The amount of fuel used by a jumbo jet during takeoff can vary depending on several factors, including the size and model of the aircraft, the distance and altitude of the flight, and the weight of the cargo and passengers on board. However, a typical passenger jet gets around 90 miles per gallon (m.p.g.) per seat, according to a reference mentioned. This means that for a fully-occupied plane, it would use around 2.6 liters of fuel per 100 kilometers.
Although the energy efficiency of an airplane compared to a car may not seem impressive on a per-passenger basis, most of the energy used by a plane is to overcome air resistance, which is essentially independent of the number of passengers onboard. Therefore, the energy required to fly a plane from point A to point B is relatively consistent, regardless of passenger load.
It's important to note that space travel and car travel have different fuel requirements, and fuel needs for space travel are much higher than for cars. Additionally, it's worth mentioning that the fuel gauge in some aircraft might indicate fuel in kilograms instead of pounds, leading to incorrect fueling if not noticed by the ground crew.