Q: 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 the journey to 20 min is:
A.
81 km/h
B.
None of these
C.
75 km/h
D.
60 km/h
Correct Answer:
Option A -
Explanations:
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