Question

With a speed of 60 km/hr a train crosses a half km. long bridge in 1 min. The
length of the train is? ​

Answer 1

Answer:

Let the length of the train be x. Running at a speed of 60 kmph it passes through a 1.5 km long tunnel in 2 mins.

The distance covered by the engine is (x+1.5+x) in 2 minutes.

60 km covered in 60 min so in 2 min the engine would have covered 60*6/60 = 2 km.

Therefore (x+1.5+x) = 2 or

2x = 2–1.5 = 0.5, or

x = 0.25 km So the train is 250 m long.

Answer 2

Answer:

Let the length of the train be x. Running at a speed of 60 kmph it passes through a 1.5 km long tunnel in 2 mins.

The distance covered by the engine is (x+1.5+x) in 2 minutes.

60 km covered in 60 min so in 2 min the engine would have covered 60*6/60 = 2 km.

Therefore (x+1.5+x) = 2 or

2x = 2–1.5 = 0.5, or

x = 0.25 km So the train is 250 m long.

Step-by-step explanation:

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