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The speed of the train is inversely proportional to the number of wagons attached to it. The speed of the train is 90 km/hr when 12 wagons are attached to it and it crosses a platform in 23 s. Find the time in which the train will cross the platform when 10 wagons are attached to it.
There is only one rail track between stations A and B on a railway line. One hour after the northbound superfast train N leaves station A for station B, the southbound passenger train S reaches station A from station B. The speed of superfast train is twice that of express train E, while the speed of passenger train S is half of that of train E. On some one day train N leaves from station A to station B 20 minutes late than its usual schedule. Both Train N and Train S have increased their speed to maintain the schedule as per the table. If the superfast train doubles its speed, then what should be the ratio (approximately) of the speed of the passenger train to the speed of the superfast train so that the passenger train reaches the station on that day at the exact scheduled time.
________ number of Guard wagons shall be attached in either direction of explosive wagons.
9 hrs after a goods train passed a station, another train travelling at a speed of 72 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 3 hours. What is the speed of the goods train?
7 hrs after a goods train passed a station, another train travelling at a speed of 54 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 11 hours. What is the speed of the goods train?
4 hrs after a goods train passed a station, another train travelling at a speed of 72 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 8 hours. What is the speed of the goods train?
5 hrs after a goods train passed a station, another train travelling at a speed of 70 km/hr following that goods train passed through that station. If afterpassing the station the train overtakes the goods train in 9 hours. What is the speed of the goods train?
3 hrs after a goods train passed a station, another train travelling at a speed of 88 km/hr following that goods train passed through that station. If afterpassing the station the train overtakes the goods train in 8 hours. What is the speed of the goods train?
4 hrs after a goods train passed a station, another train travelling at a speed of 60 km/hr following that goods train passed through that station. If afterpassing the station the train overtakes the goods train in 8 hours. What is the speed of the goods train?
9 hrs after a goods train passed a station, another train travelling at a speed of 72 km/hr following that goods train passed through that station. If afterpassing the station the train overtakes the goods train in 3 hours. What is the speed of the goods train?