Depending on the engine in a 172 they will burn from 6-10 gallons per hour
100 LL Avgas.
My Cessna 172 (C172) holds 200 liters. 100 in the left wing and 100 in the right wing.
No. The Cessna 172 is a single engine aircraft. It has a 4 seat cabin.
Depends on the model and tanks, but 38 usable is quite standard.
It depends entirely on the aircraft, type of fuel, how much fuel and where you are in the world. For instance, to fill a Cessna 172 in Canada or US would cost about as much as filling an average minivan, - a 747 would be a bit more - -
The Cessna 172 Skyhawk is a small light aircraft first flown in 1955. Images of the Cessna 172 Skyhawk can be found on line and in aircraft industry literature.
Cessna
Most small engine aircraft such as Cessna's use a low leaded gas, usually blue in colour. But a lot of Cessna's can be converted to use regular gas that you would use in a car.
The Cessna 172 has slotted flaps.
They run on 100LL avgas. It has a different price at every airport. Go to http://www.airnav.com, click on "Airports" then enter the name of the airport you want to use to learn the cost of fuel there.
The ceiling height of a Cessna 172 is 13,500 ft. The optimum altitude for maximum range is 12,000 ft.