Question

A 100 m long train crosses a bridge of length 200 m in 50 seconds with constant velocity. Find the velocity.

Answer 1

We know that:

The total distance that the train should be covered is the length of the:

Train + Tunnel:

$\implies$ 100 + 200

$\implies$ 300 m

Time given = 50 seconds

Note: The train moves with the constant velocity.

Now:

$\boxed{\sf{Velocity\:of\:the\:train = \frac{Distance\:covered}{Time\:taken}}}$

$\implies$ $\sf{\frac{300}{50}}$

$\implies$ $\sf{6\:m/s}$

Therefore:

Velocity of the train = 6 m/s

Answer 2

Answer:

Completely out of the tunnel, the total distance that the train should be covered is length of the train + length of the tunnel = 100+200 = 300 m

Time given = 50 seconds as the train move with the constant velocity.

Velocity of the train = distance covered /time taken

                               = 300/50

                               = 6 m/s

Therefore, velocity of the train = 6 m/s