Two trains having length of 140 metre and 160 metre long run at the speed of 60 km/hr and
40 km/hr respectively in opposite directions (on parallel tracks). The time which they take to cross each other, is  Choose the correct choice from the following
A) 10.8 sec  B) 12 sec  C) 9.8 sec  D) 8 sec  E) 10 sec
dist -(140+160) = 300 m = 0.3 km   relative speed = (60+40)= 
<gadget id="calculator">(60+40)</gadget>
<output>100</output>
100 km/hr   req time= 0.3/100 hr   0.3/100 * 3600= 
<gadget id="calculator">0.3/100 * 3600</gadget>
<output>10.8</output>
10.8 sec   10.8 secNSWER 10.8 sec
<result>A</result>
Two trains having length of 140 metre and 160 metre long run at the speed of 60 km/hr and
40 km/hr respectively in opposite directions (on parallel tracks). The time which they take to cross each other, is