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?	Choices
A) 4 min	B) 5 min	C) 3 min 4 sec	D) 4 min 5 sec	E) Data inadequate
Explanation:   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   4 minNSWER IS 4 min
<result>A</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?