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187 US gallons is approximately 578 Kg.
There are 1000 kilograms (kg) in a metric ton (or tonne). And there are about 0.264 gallons in a litre. Also, the density of diesel fuel is right at about 0.85 kilograms per litre. Since you have a metric ton of diesel fuel, that is 1000 kilograms of diesel fuel, you need to know how many litres of diesel fuel you have. Divide 1000 kg by 0.85 kg/litre and you'll get about 1176.5 litres. Now convert that to gallons by multiplying 1176.5 litres by 0.264 gallons/litre and you'll get about 310.6 gallons of diesel fuel in that metric ton you started with.
1.25
There are 2 different fuel types but Jet A is the most common. Jet A / Jet A-1: 0.775 to 0.840 kg/L Jet B: 0.751 to 0.802 kg/L
Anything will float on water as long as it's density is lower than that of water. The density of jet fuel is around 0.81 kg/L while that of pure water is 1 kg/L. Thus, jet fuel floats.
You would need the density of the substance.
The accepted average weight of Jet A fuel is 6.84 pounds per gallon based on specific gravity (but varies based on temperature, additives, etc.) The Boeing 747-400ER can carry more than 63,500 gallons of fuel which is about 434,340 pounds fuel load weight. Information provided by Jet Advisors
1/1.25=.80kg
73440
A documented 600 mile, short-haul roundtrip from London to Dusseldorf in a BA A320-100 used 4,800 kg of fuel for a total of 114 minutes aloft. 4,800kg of Jet Fuel is roughly equal to 1,590 US Gallons which gives a fuel economy of 0.377 mpg / 2.65 gal/mile.
After flying from PHL (Philadelphia, PA) to Madrid, Spain in an Airbus 330, I asked the pilot how much fuel we used. It is approximately a 6.5 hour flight, about 3667 miles or 5900.4 Km. The pilot said we burned about 110,000 pounds of jet fuel, or about 22,000 gallons, since jet fuel weighs about 5 pounds per gallon. In metric units, 49,940 Kg. Since jet fuel floats on water (is less dense, therefore takes more than a liter per Kg), the volume would be more than 49,940 liters. Multiplying 22,000 gallons by 3.785 gallons per liter gives us about 83,000 liters (a first order estimate). Since there are 390 minutes in 6.5 hours, we burned about 30 pounds of jet fuel per mile, or about 8.5 Kg per Km. Per minute (remember, the jet is doing about 10 miles per minute, or about 600 miles per hour, about 900 Km per hour), 282 pounds of jet fuel (which smells a lot like kerosene), or 128 Kg per minute. At approximately 4 USD per gallon, the fuel cost was about 88,000 USD, or about 13,500 USD per hour of flight. At 3.00 USD per gallon, the fuel cost is about 66,000 USD, or about 10,150 USD per hour. This covers the current price range for kerosene type jet fuel as of today (3.23 USD spot price), Tuesday April 10 2012. Prices for Jet-A (higher grade jet fuel) range between 4 and 7 USD per gallon, so if the A330 requires Jet-A, the cost would be much higher. The A330 seats between approximately 250 and 335 passengers, depending on the specific model (-300, etc) and the seating arrangement (3 classes (First, Business and Coach), 2 classes (First and Coach), number of seats in each class, etc).
To convert kilograms to gallons, you need to know the density of the substance being measured. Different substances have different densities, so there is no direct conversion from kilograms to gallons.