A train 440 meters long is running with a speed of 45 kmph. The time taken by it to cross a tunnel 180 meters long is?	Choose the correct choice from the following options.
A) 40.6 sec B) 41.6 sec C) 42.6 sec D) 49.6 sec E) 44.6 sec
49.6 sec = 440 + 180= 
<gadget id="calculator">440 + 180</gadget>
<output>620</output>
620   S= 45 * 5/18= 
<gadget id="calculator">45 * 5/18</gadget>
<output>25/2 = around 12.5</output>
12.5 mps   T= 620/12.5= 
<gadget id="calculator">620/12.5</gadget>
<output>49.6</output>
49.6 sec   ANSWER:49.6 sec
<result>D</result>
A train 440 meters long is running with a speed of 45 kmph. The time taken by it to cross a tunnel 180 meters long is?