Question

A train passes through tunnel 600m long.it takes 1 minute .if the train is 250m long then what is it's speed?

Answer 1

If the train passes the tunnel then it will take 600m of the tunnel and 250m of its own length to pass through it. Think logically, first the engine will enter and cross it making 600m, but even after the engine is out of the tunnel, the rest of the train is still in it.

Therefore total distance = 600m +250m = 850m

Speed = distance/time = 850m/60s

Speed = 85/6 = 14.167ms^-1
 

Answer 2

600 m = 1minute so
250 m= ???
1 m = 1/600 .....
find the answer and
multiply the answer into 250 m