Two trains are moving in opposite directions with speeds of 35 m/
| Two trains are moving in opposite directions with speeds of 35 m/s and 45 m/s respectively. From the time they are 12 km apart, how much time would they take to cross each other?
A. 2 minutes 30 seconds
B. 2 minutes
C. 3 minutes
D. 3 minutes 30 seconds
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
Two trains are moving in opposite directions with speeds of 35 m/s and 45 m/s respectively.
If the trains are running in the opposite direction, then
Effective speed = 35 + 45 = 80 m/s
Distance = 12 km or 12000 m
As we know-
Time = Distance/Speed
Time = 12000/80 = 150 sec
As we know
150 second = 2 min 30 sec