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Question
The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:
Options:
A .  70 km/hr
B .  75 km/hr
C .  84 km/hr
D .  87.5 km/hr
Answer: Option D
Answer: (d).87.5 km/hr

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