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Difficulty:
Question Stats:
16% (03:16) correct 84% (03:36) wrong based on 454 sessionsCan be determined | Cannot be determined | |
What percentage of their revenue did freight railroad companies spend to maintain tracks and machinery from 1980 to 2009? | ||
On average, do freight railroad companies buy more fuel per year than freight trucking companies do? | ||
Approximately how much revenue did freight railroad companies take in from 1980 to 2009? |
Difficulty:
Question Stats:
64% (00:57) correct 36% (01:01) wrong based on 291 sessions4 billion liters | |
9 billion liters | |
20 billion liters | |
25 billion liters | |
100 billion liters |
Difficulty:
Question Stats:
78% (01:37) correct 22% (01:43) wrong based on 261 sessionsYes | No | |
Fuel efficiency | ||
Total machinery maintenance costs | ||
Transportation cost per unit of freight |
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