Airplanes use 150,000 liters of fuel during a 10 hour long flight. An airplane took off with 24,090 kilograms of fuel in its tank.

If 1 liter of jet fuel weighs 0.803 kilograms, which of these conclusions is correct about the airplane?

It will run out of fuel after 1 hour.

It will run out of fuel after 2 hours.

It has enough fuel to run for 3 hours.

It has enough fuel to run for 4 hours.

Question

Airplanes use 150,000 liters of fuel during a 10 hour long flight. An airplane took off with 24,090 kilograms of fuel in its tank. 

If 1 liter of jet fuel weighs 0.803 kilograms, which of these conclusions is correct about the airplane?

 It will run out of fuel after 1 hour.

 It will run out of fuel after 2 hours.

 It has enough fuel to run for 3 hours.

 It has enough fuel to run for 4 hours.

anonymous · Answer

It will run out of fuel after 2 hours.

anonymous · Answer

adeshendge is correct - the density of the fuel means that the aeroplane has 30000l of fuel on board and it burns it at an average of 15000 l per hour so there's about two hours worth. One would hope the airport is less than two hours flying time!