The length of train P and that of train Q is 350m and 440m respectively and their speed is 54 km/hr and 108 km/hr respectively. What will be the sum of time taken by train P and train Q to cross each other while moving in same direction and opposite direction?
1
56.77 seconds
2
70. 23 seconds
3
79.75 seconds
4
90 seconds
5
87. 23 seconds