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.

Answer 1

a. because 150000/ 10 = 15000. if the plane took off with 24090 kilos of fuel itll run out after an hour.

Answer 2

Option B, It will run out of fuel after 2 hours.

Step-by-step explanation:

Given -

For a
`10` hour flight , amount of fuel used
`= 150000`

`1` liter of fuel
`= 0.803` Kg

So,
`24,090` kg of fuels in liters

`= (24,090)/(0.803) \\= 30,000` liters

`150000` liter of fuel lasts for
`10` hours

`1` liter of fuel lasts for
`(10)/(150000)` hours

and
`30000` liter of fuel lasts for

`(10)/(150000) * 30000\\= 2`

Thus, option B is correct