Question

a train passes over a 400 m long bridge. if the speed of the train is 30 ms per second​

Answer 1

Answer:

Let the length of the train be L.

Total distance cover by the engine to cross the bridge d=400+L

Speed of train v=30 m/s

Time taken t=20 s

Using d=vt

or 400+L=30×20

⟹ L=200 m

HOPE it help you ✌️✌️✌️

Answer 2

Answer:

$\huge\rm\orange{Question}$

Find the time.

Explanation:

Speed=30m/s

Distance=400m

Time=D/S=400m/30m/s=120sec

Here's ur answer mate.

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$\huge\rm\orange{Shubhrapriya12}$