Two trains are moving at 90 kmph and 70 kmph in opposite directions. Their lengths are 150 m and 100 m respectively. The time they will take to pass each other completely is?
Choose the correct choice from the following answers.
A) 42/5 sec  B) 45/8 sec  C) 40/6 sec  D) 37/6 sec  E) 42/4 sec
70 + 90 = 150 * 5/18 = 400/9 mps   D = 150 + 100= 
<gadget id="calculator">150 + 100</gadget>
<output>250</output>
250 m   T= 250 * 9/400 = 45/8 sec   Answer:45/8 sec
<result>B</result>
Two trains are moving at 90 kmph and 70 kmph in opposite directions. Their lengths are 150 m and 100 m respectively. The time they will take to pass each other completely is?