. Two trains 140m and 160m long run at the speed of 60km/hr
and 40km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other is
A: 9
B: 9.6
C: 10
D: 10.8
Best Answer
Explanation:
When two bodies move in opposite direction, then the Relative Speed = Sum of Speeds
Relative speed =(60+40)km/hr
=100km/hr
=100 ×18 /5m /sec
=250 /9m /sec
Distance covered by the trains in crossing each other =(140+160)km=300km
Required time =Distance /Speed
=300 /250 ×9
=10.8sec
Final Answer:
Hence, the correct option is D i.e. 10.8
Related questions
