2 hours after train A leaves Lucknow a train B leaves the same stationtraveling in the same direction at an average speed of 16 km/hr. After traveling 6 hrsthe train B overtakes the train A. What is the average speed of the train A?	Choose the correct choice from the following options.
A) 12 km/hr  B) 16.5 km/hr  C) 17 km/hr  D) 18 km/hr  E) None of these
Explanation :   Total distance covered by B=16*6= 
<gadget id="calculator">16*6</gadget>
<output>96</output>
96kmTotal time taken by 12 km/hr to cover same distance=2+6= 
<gadget id="calculator">2+6</gadget>
<output>8</output>
8 hrsaverage speed of 12 km/hr=96/8= 
<gadget id="calculator">96/8</gadget>
<output>12</output>
12 km/hr   12 km/hrnswer : 12 km/hr
<result>A</result>
2 hours after train A leaves Lucknow a train B leaves the same stationtraveling in the same direction at an average speed of 16 km/hr. After traveling 6 hrsthe train B overtakes the train A. What is the average speed of the train A?