Two trains of equal length travelling in opposite directions at 72 km/h and 108 km/h cross each other in 10 second. In how much time (in seconds) does the first train cross a platform of length 350 m?

Two trains of equal length travelling in opposite directions at 72 km/

1.	Two trains of equal length travelling in opposite directions at 72 km/h and 108 km/h cross each other in 10 second. In how much time (in seconds) does the first train cross a platform of length 350 m?
A.	32
B.	36
C.	24
D.	30
Answer» E.