A train 540 meters long is running with a speed of 54 kmph. The time taken by it to cross a tunnel 180 meters long is?
Select the correct option:  A) 22  B) 27  C) 48  D) 99  E) 23
D = 540 + 180= 
<gadget id="calculator">540 + 180</gadget>
<output>720</output>
720   S= 54 * 5/18= 
<gadget id="calculator">54 * 5/18</gadget>
<output>15</output>
15 mps   T= 720/15= 
<gadget id="calculator">720/15</gadget>
<output>48</output>
48 sec   Answer: 48
<result>C</result>
A train 540 meters long is running with a speed of 54 kmph. The time taken by it to cross a tunnel 180 meters long is?