Q421
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
AnswerC.
60 km/h
D.
75 km/h
Answer: Option B
Solution
Answer: Option B
Solution: