Question

A train take 5 second time to cross a signal post and take 15 second to cross a bridge of length 540 meter. Find the length of the train and it's speed?​

Answer 1

Answer:

Length = 270m

Velocity = 54 m/s

Step-by-step explanation:

Let the length of the train be x.

The train take 5 second time to cross a signal post,

v = x/5 -----(1), x = 5v ----(2)

The train take 15 second to cross a bridge of length 540 meter,

v = (540+x)/15

15v = 540 + x

x = 15v - 540 ---------(3)

(2) = (3)

5v = 15v - 540

v = 54 m/s

x = 5×54 = 270m