Two trains are moving at 80 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?  Select:
A) 4 sec
B) 5 sec
C) 6 sec
D) 7 sec
E) 8 sec
70 + 80= 
<gadget id="calculator">70 + 80</gadget>
<output>150</output>
150 * 5/18= 125/3 mps   D = 150 + 100= 
<gadget id="calculator">150 + 100</gadget>
<output>250</output>
250 m   T= 250 * 3/125= 
<gadget id="calculator">250 * 3/125</gadget>
<output>6</output>
6 sec   Answer:6 sec
<result>C</result>
Two trains are moving at 80 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?