A train covers a distance in 30 min 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 journey to 20 min is:

A train covers a distance in 30 min if it runs at a speed of 54 km/h o

1.	A train covers a distance in 30 min 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 journey to 20 min is:
A.	60 km/h
B.	none of these
C.	81 km/h
D.	75 km/h
Answer» D. 75 km/h

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A train covers a distance in 30 min 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 journey to 20 min is:

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