A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 550 m long?  Pick one.
A) 70sec	B) 72sec	C) 74sec	D) 76sec	E) 79sec
Speed = 240/24= 
<gadget id="calculator">240/24</gadget>
<output>10</output>
10 m/sec.   Required time= (240 + 550)/10= 
<gadget id="calculator">(240 + 550)/10</gadget>
<output>79</output>
79 sec.   Answer:79sec
<result>E</result>
A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 550 m long?