The speeds of the two trains are in the ration 3 4 they are moving in opposite tracks on parallel tr...........

Quantitative Aptitude ( CCS) Problems on trains

The speeds of the two trains are in the ration 3:4. they are moving in opposite tracks on parallel tracks. The time taken by both the trains to cross a telegraph line are 5 and 10 second respectively. Find the time taken by the trains to cross each other completely?

4 5/7seconds