Question

A train passes over a 400 m long bridge. If the
speed of the train is 30 m/s and the train takes
20 s to cross the bridge, find the length of the
train.
(A) 400 m
(B) 600 m
(C) 800 m
(D) 200 m
.
.
.
.
Please answer fast with a full explanation........its urgent!!​

Answer 1

Answer:

200

Explanation:

Correct option is

D

200 m

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