A train covers a distance in 30 minutes If it runs...

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A train covers a distance in 30 minutes. If it runs at a speed of 54 km/h on an average. The speed at which the train must run to reduce the time of the journey to 20 minutes is:

A. None of these

B. 81 km/h

C. 60 km/h

D. 75 km/h

Answer: Option B

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