A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 500 m long?  Choose the correct choice from the following options:
A) 65sec  B) 70sec  C) 74sec  D) 80sec  E) 85sec
Speed = 240/24= 
<gadget id="calculator">240/24</gadget>
<output>10</output>
10 m/sec.   Required time= (240 + 500)/10= 
<gadget id="calculator">(240 + 500)/10</gadget>
<output>74</output>
74 sec.   Answer:74sec
<result>C</result>
A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 500 m long?