Answer:
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A train travels 50 mi and car travels 40 mi in within same time.
The ratio of distances remains same if we assume they have constant speed.
Let the train travels t mi while the car travels 60 mi, then the ratios are:
- train / car = 50 / 40 = t / 60
- t = 50*60/40
- t = 75
The matching option is d.