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How do I calculate the volume of fuel required for a train when given the force, distance, maximum energy and efficiency?

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Hello, I have a problem where I need to find the volume of fuel required for a train that is going at a constant speed when:

The force is 36363N

The displacement is 200,000m

The fuel stores 40MJ of chemical energy

The engines have an efficiency of 32%

A maximum output of power of 2MW*

A top speed of 55ms^-1*

* Don't think these are relevant

It can't be as easy as work done = force * displacement can it? They give efficiency and chemical energy for a reason.

Closed as per community consensus as the post is not graduate-level

asked Dec 7, 2016 in Closed Questions by JAD1 (-20 points) [ no revision ]
recategorized Dec 9, 2016 by Dilaton

This is not graduate-level, voting to close.

But it would probably be on-topic in the appropriate section of PhysicsForums or for this young physics problem solving community

commented Dec 8, 2016 by Dilaton (6,240 points) [ revision history ]

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