Question

a train 120m long is moving at a speed of 126km/hr. it crosses a train 150m long moving in the same direction on parallel tracks in 27 seconds. what is the speed of second train.

Answer 1

10 km per hour wil b the speed of train

Answer 2

Answer:

Speed of second train will be 90 km/h.

Step-by-step explanation:

Given : A train 120m long is moving at a speed of 126km/hr. it crosses a train 150m long moving in the same direction on parallel tracks in 27 seconds.

To find : What is the speed of second train?

Solution :

Total distance covered by first train to cross the second train

⇒120+150 = 270 m

Let velocity of second train = x km/h

Relative velocity of trains= (126-x) km/h = (126-x)5/18 m/s

v=d/t

(126-x)5/18 = 270/27

x = 90

So, speed of second train will be 90 km/h.