A train 120 m long passed a pole in 12 sec. How long will it take to pass a platform 380 m long? Pick one.
A) 25 sec  B) 50 sec  C) 75 sec  D) 100 sec  E) 125 sec
Speed = 120/12= 
<gadget id="calculator">120/12</gadget>
<output>10</output>
10 m/sec.   Required time= (120 + 380)/10= 
<gadget id="calculator">(120 + 380)/10</gadget>
<output>50</output>
50 sec   Answer:50 sec
<result>B</result>
A train 120 m long passed a pole in 12 sec. How long will it take to pass a platform 380 m long?