11. A train 180 m long travels at 66 km per hour. A man is running at 6 km per hour in the direction opposite to that in which the train is going. The train will cross the man in –
(a) 15 seconds
(b) 12 seconds
(c) 9 seconds
(d)16 seconds
12. A train overtakes a man who is walking along the rails in the same direction at 6 km/hr and completely overtakes him in 20 seconds. If the length of the train is 200 m, then its speed is?
(a) 44 km/hr
(b) 41 km/hr
(c) 42 km/hr
(d) 40 km/hr
13. A train running at 40 km/hr. passes a person riding parallel to the railway line in the same direction at 25 km/hr. in 48 seconds. Then the length of the train is?
(a) 200 m
(b) 300 m
(c) 400 m
(d) 500 m
14. Two trains 250 meters and 350 meters long respectively travel with uniform speeds on parallel lines from opposite directions. If they cross each other in 1 minute, and the speed of one train be 30 km/hr, then the speed of the second train will be?
(a) 18 km/hr
(b) 6 km/hr
(c) 9 km/hr
(d) 12 km/hr
15. The average speed of a train, including stoppages, was 40 km/hr and excluding stoppages, it was 50 km/hr. How many minutes per hour did the train stop?
(a) 12
(b) 20
(c) 18
(d) 16
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