Question

Two trains coming from the opposite sides crosses each other in 10 seconds if the lengths of first train and second
train be 125 m and 175 m respectively, also the speed of first train be 36 km/h, find the speed of second train
(a) 20 km/h
(b) 25 km/h
(C) 54 km/h
(72 km/h
​

Answer 1

Answer:

c

Step-by-step explanation:

you take 175 and divided 125 x 10 sec and you get 54

Answer 2

Answer:

Step-by-step explanation:

Speed, Distance and Time:

The rate at which an object moves from one location to another in a predetermined amount of time is referred to as its speed. It is a scalar quantity because it only describes the magnitude of an object's motion, not its direction. M/s is the S.I. unit of speed.

$Speed = \frac{distance}{time}$

m/sec to km/hr  conversion:

$x m/sec = x * \frac{18}{5} km/hr$

Given:

• Length of train 1 = 125 m
• Length of train 2 = 175 m
• Two train cross each other in 10 seconds
• Speed of first train is 36km/hr.

To Find:

We need to find the speed of the train 2.

Solution

Total Length = Length of train 1 + Length of train 2 $= 125 +175 = 300$

$Speed = \frac{distance}{time taken}$

$Speed = \frac{300}{10}$

$Speed = 30 m/sec$

Relative Speed in Km/hr $= 30* \frac{18}{5} = 6*18=108 km/hr$

Speed of first train is $36km/hr$.

Speed of train 2 $= 108 -36 = 72km/hr$

Therefore, The Speed of train 2 is 72 km/hr.

#SPJ2