A 600 meter long train crosses a signal post in 40 seconds. How long will it take to cross a 18 kilometer long bridge, at the same speed?
Options
A) 14 min  B) 20 min  C) 18 min  D) 19 min  E) 13 min
S = 600/40= 
<gadget id="calculator">600/40</gadget>
<output>15</output>
15 mps   S= 18000/15= 
<gadget id="calculator">18000/15</gadget>
<output>1_200</output>
1200 sec= 20 min.Answer: 20 min
<result>B</result>
A 600 meter long train crosses a signal post in 40 seconds. How long will it take to cross a 18 kilometer long bridge, at the same speed?