A train 220 m long passed a pole in 22 sec. How long will it take to pass a platform 550 m long?  Answers.
A) 77
B) 82
C) 43
D) 67
E) 29
Speed = 220/22= 
<gadget id="calculator">220/22</gadget>
<output>10</output>
10 m/sec.   Required time= (220 + 550)/10= 
<gadget id="calculator">(220 + 550)/10</gadget>
<output>77</output>
77 sec.   77nswer: 77
<result>A</result>
A train 220 m long passed a pole in 22 sec. How long will it take to pass a platform 550 m long?