Two trains 121 meters and 153 meters in length respectively are running in opposite directions, one at the rate of 80 km and the other at the rate of 65 kmph. In what time will they be completely clear of each other from the moment they meet?
Choose the most appropriate option:
A) 7.19
B) 6.8
C) 7.2
D) 7.15
E) 7.11

Rationale: "t = ( 121 + 153 ) / ( 80 + 65 ) * 18 / 5 t = 6.8 answer : b"
Answer: B