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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.

Respuesta :

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

Answer:

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

Explanation:

Given -

For a [tex]10[/tex] hour flight , amount of fuel used [tex]= 150000[/tex]

[tex]1[/tex] liter of fuel [tex]= 0.803[/tex] Kg

So, [tex]24,090[/tex] kg of fuels in liters

[tex]= \frac{24,090}{0.803} \\= 30,000[/tex] liters

[tex]150000[/tex] liter of fuel lasts for [tex]10[/tex] hours

[tex]1[/tex] liter of fuel lasts for [tex]\frac{10}{150000}[/tex] hours

and [tex]30000[/tex] liter of fuel lasts for

[tex]\frac{10}{150000} * 30000\\= 2[/tex]

Thus, option B is correct

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