Question 993864
Two trains of length 55 metres and 65 metres travel in opposite directions with speed 70 km/hour and 50 km/hour respectively.
 Find the time taken for them to completely cross one another.
:
The relative speed between the two trains: 70 + 50 = 120 km/hr
Change 120 km/hr to meters/sec
{{{(120*1000)/3600}}} = 33{{{1/3}}} meters per sec
:
Find the no. of seconds to travel 55 + 65 = 120 meters
{{{120/33.33}}} = 3.6 seconds