Math query-do not send me to any web site plz?

Question

a train weighs 120,000 pounds
it can travel, using diesel fuel, 16 kilometers in one hour--[it has unlimited fuel]
You don't state the size of the diesel tank, nor the battery capacity. The problem states rates, only. If it were to say, "...diesel... 16 km FOR one hour", etc. then it might make more sense.
I'll assume these are rates for the given hour.
It is DESIRED that he DOES use all 3 means simultaneously. For diesel and battery power (16+ 4): 20 km / hour for the first 2 hours. That's an average speed of 10 km/ hr., After that he's at the mercy of the wind. So long as the wind keeps up, he can keep the train moving along slowly, at 2 km /hour indefinitely. After the 3rd hour his average speed will be 22 km/3 hours = 7.3333 km/ hour. After 4 hours it will be 24 km / 4 hours = 6 km/hr. Then 26 km / 5 hours...it can travel 4 kilometers in one hour using elect generators.
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won't 3 resources give it more speed?
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Answer 1

With all due respect, I cannot understand what you're asking.

First, the question is weird in that it mixes metric (km/h) and imperial (pounds). Second you don't mention what the pounds/weight has to do with it. Third, what does the wind have to do with it? It's not a sailboat. No wind, short of a hurricane, is going to push a train, and even then it won't be along the track.

Engines generally run on one resource. Some may be powerful enough to drive an engine at full capacity, some at part capacity, but generally an engine is tied to a resource. If it's an electric engine, you could create electrical power with the diesel, but otherwise you're talking multiple engines, which would not be easy to run simultaneously, at least on a train.

So, I honestly don't really know enough about what you're asking to be able to answer. You'll have to better phrase it and/or provide complete info.