A train travels 42.5 km/hr. How many metres will it travel in 12 minutes 

A train passes through a tunnel with length 500 metres in one minute running at a speed of 72km/hour.If so, what is the length of the train ?

A 1 km long train passes through a tunnel of 1 km length at a speed of 1 km per minute. How much time will it take to pass through it completely?

A train which is 1 km long travelling at a speed of 80 km/hr, enters a tunnel 2 km of length. What time does the train take to come fully out of the tunnel? 

A train covers a distance of 180 km.in four hours. Another train covers the same distance in one hour less. The difference in distance in k.m. covered by these trains in one hour is:

Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/ hr respectively in opposite direction on parallel tracks. The time (in second) which they take to cross each other is?