The maximum quantity of fuel that can be loaded into an aircraft's tanks is given as 2200 l. If the fuel density (specific gravity) is given as 0.79 the mass of fuel which may be loaded is…
A relationship exists between litres and kilograms: one litre of water weighs one kilogram.
A similar relationship exists between pounds and imperial gallons (IG): one IG of water weighs ten pounds.
To convert from volumes to mass or mass to volumes, you need the Specific Gravity of the fuel.
The Specific Gravity (SG) shows the relationship between litres and kilograms or between pounds and imperial gallons. Specific Gravity 0.79 means that a volume of fuel weighs 79% of the equivalent volume of water.
For this question, 2200 lt of fuel volume has a fuel mass of: 2200 lt x 0.79 = 1738 kg.
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