A train 120 m long passed a pole in 6 sec. How long will it take to pass a platform 800 m long?
Choose the correct answer:
A) 42  B) 44  C) 46  D) 48  E) 50
Speed = 120/6= 
<gadget id="calculator">120/6</gadget>
<output>20</output>
20 m/sec.   Required time= (120 + 800)/20= 
<gadget id="calculator">(120 + 800)/20</gadget>
<output>46</output>
46 sec.   Answer:46
<result>C</result>
A train 120 m long passed a pole in 6 sec. How long will it take to pass a platform 800 m long?