railway DFCCIL MTS 2025 Mock Test Series Quantitative Aptitude Speed Time and Distance Problem on Trains
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:
1
60 km/h
2
none of these
3
81 km/h
4
75 km/h