A 600 meter long train crosses a signal post in 60 seconds. How long will it take to cross a 3 kilometer long bridge, at the same speed?	Choose the correct option.
A) 4 min B) 2 min C) 6 min D) 9 min E) 5 min
S = 600/60= 
<gadget id="calculator">600/60</gadget>
<output>10</output>
10 mps   S= 3600/10= 
<gadget id="calculator">3600/10</gadget>
<output>360</output>
360 sec= 6 min   Answer: 6 min
<result>C</result>
A 600 meter long train crosses a signal post in 60 seconds. How long will it take to cross a 3 kilometer long bridge, at the same speed?