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A train 300 m long crossed a platform 900 m long in 1 minute 12 seconds. The speed of the train in km/hr was?

45
50
54
60

Correct Answer: 60

Explanation:

Distance covered in 72 sec. = 300 + 900 m
∴ Speed = 1200/72 = 50/3 m/sec. = 60 km/hr .

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