A train 520 meters long is running with a speed of 52 kmph. The time taken by it to cross a tunnel 160 meters long is?
Choose the correct choice from the following:
A) 287 sec
B) 288 sec
C) 47 sec
D) 16 sec
E) 17 sec
D = 520 + 160= 
<gadget id="calculator">520 + 160</gadget>
<output>680</output>
680   S= 52 * 5/18 = 14.4 mps   T = 680/14.4 = 47 sec   Answer: 47 sec
<result>C</result>
A train 520 meters long is running with a speed of 52 kmph. The time taken by it to cross a tunnel 160 meters long is?