Two trains 111 meters and 165 meters in length respectively are running in opposite directions, one at the rate of 100 km and the other at the rate of 120 kmph. In what time will they be completely clear of each other from the moment they meet?	Choose the correct choice from the following answers:
A) 4.85	B) 7.85	C) 4.51	D) 5.85	E) 6.15
T = (111 + 165)/ (100 + 120) * 18/5   T = 4.51   ANSWER:4.51
<result>C</result>
Two trains 111 meters and 165 meters in length respectively are running in opposite directions, one at the rate of 100 km and the other at the rate of 120 kmph. In what time will they be completely clear of each other from the moment they meet?