Two trains are moving at 40 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 answer: A) 41/2 sec B) 5/2 sec C) 61/2 sec D) 71/6 sec E) 49/6 sec
70 + 40= 
<gadget id="calculator">70 + 40</gadget>
<output>110</output>
110 * 5/18= 275/9mps   D = 150 + 100= 
<gadget id="calculator">150 + 100</gadget>
<output>250</output>
250 m   T= 250 * 9/275 = 49/6 sec   Answer:49/6 sec
<result>E</result>
Two trains are moving at 40 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?