Madhya Pradesh Police Exam Model Paper 9

Question : 66 of 100

Marks: +1, -0

Train A and B having length 121 meters and 129 meters moving in opposite direction. Speed of train A is 40 km/h and speed of train B is 68 km/h. Find the time they take to cross each other.

8.33 s
7.33 s
5.33 s
6.33 s

Validate

Solution:

Given:
Length of train A = 121 m
Length of train B = 129 m
Speed of train A = 40 km/h
Speed of train B = 68 km/h
Formula used:
Time = Distance/Speed
Calculation:
Length of train A and B

= 121 + 129 = 250

m
Relative speed = (40 + 68) = 108 km/h = 108 × (5/18) m/sec = 30 m/sec
Now,
Time = 250/30 = 8.33 seconds

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