Question

a goods train 80 metres long takes 0.5 min in crossing a tunnel 420 metre long what is the speed of a train​

Answer 1

Answer:

1000 metre / minute

Step-by-step explanation:

Length of train = 80 m  

Length of tunnel = 420 m

Total distance = 80 m + 420 m = 500 m

Time taken to cross tunnel =  minute

Speed of train =  distance / time

Speed of train =   500/ 1/2

= 500 x 2/1

=1000/1

Speed of train =1000 m / minute

Hence The speed of the train is 1000 m / minute.

Answer 2

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Q. a goods train 80 metres long takes 0.5 min in crossing a tunnel 420 metre long what is the speed of a train.

✧ Given :-

• The train measures 80m.
• The tunnels is 420m.
• Time taken to cross the train 0.5min.

✧ To find :-

• Speed of the train = ?

✯ Formula :-

• Speed = total distance covered/total time taken

Here, total distance covered by the train is (420 + 80)m = 500m.

Now,

Speed = 500/0.5

Speed = 1000m/s. ☞ ans.