A 1km 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 moves with a speed of 108km/hr. Its speed in metre per second is: 

 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?