A Train T1 starts from Ahmedabad to Mumbai at 7 am and reaches at 12 noon. A second train T2 starts at 7 am from Mumbai reaches Ahmedabad at 1 pm. When did the two train cross each other ?	Choose the most appropriate option.
A) 10.13 am  B) 10.00 am  C) 9.43 am  D) 9.35 am  E) none of these
Let the distance be x between the two stations.   Train T1 takes 5 hours to reach Mumbai.   Train T2 takes 6 hours to reach Ahemedabad.   Relative speed of both the train will be added = x/5 + x/ 6 = 11x/30   Time taken = (x/11)*(x/30) = 30/11   or, (30 X 60 )/11 =~ 2.43 hours   so 7 + 2.43= 
<gadget id="calculator">7 + 2.43</gadget>
<output>9.43</output>
9.43 am   ANSWER:9.43 am
<result>C</result>
A Train T1 starts from Ahmedabad to Mumbai at 7 am and reaches at 12 noon. A second train T2 starts at 7 am from Mumbai reaches Ahmedabad at 1 pm. When did the two train cross each other ?