A 600 meter long train crosses a signal post in 40 seconds. How long will it take to cross a 3 kilometer long bridge, at the same speed? Choose the correct choice from the following answers:  A) 2  B) 3  C) 4  D) 1  E) 8
S = 600/40= 
<gadget id="calculator">600/40</gadget>
<output>15</output>
15 mps   S= 3600/15= 
<gadget id="calculator">3600/15</gadget>
<output>240</output>
240 sec= 4 min   ANSWER 4
<result>C</result>
A 600 meter long train crosses a signal post in 40 seconds. How long will it take to cross a 3 kilometer long bridge, at the same speed?