A train 360 m long passed a pole in 30 sec. How long will it take to pass a platform 780 m long? Choose the correct choice:
A) 76 sec
B) 89 sec
C) 87 sec
D) 95 sec
E) 16 sec
Speed = 360/30= 
<gadget id="calculator">360/30</gadget>
<output>12</output>
12 m/sec.   Required time= (360 + 780)/12= 
<gadget id="calculator">(360 + 780)/12</gadget>
<output>95</output>
95 sec.   Answer:95 sec
<result>D</result>
A train 360 m long passed a pole in 30 sec. How long will it take to pass a platform 780 m long?