7.  Two trains of equal length are running on parallel lines in the same direction at 46 km/hr and 36 km/hr. The faster train passes the slower train in 36 seconds. The length of each train is:  
Answer: Option A Explanation:
Let the length of each train be x metres. Then, distance covered = 2x metres. Relative speed = (46 – 36) km/hr
2x = 100 x = 50. 
8.  A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?  
Answer: Option A Explanation:
Total distance to be covered = (360 + 140) m = 500 m.

9.  Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is:  
Answer: Option C Explanation:
Relative speed = (60+ 90) km/hr
Distance covered = (1.10 + 0.9) km = 2 km = 2000 m.

10.  A jogger running at 9 kmph alongside a railway track in 240 metres ahead of the engine of a 120 metres long train running at 45 kmph in the same direction. In how much time will the train pass the jogger?  
Answer: Option C Explanation:
Speed of train relative to jogger = (45 – 9) km/hr = 36 km/hr.
= 10 m/sec. Distance to be covered = (240 + 120) m = 360 m.
