A train 280 m long passed a pole in 28 sec. How long will it take to pass a platform 660 m long?
Choose one:
A) 52  B) 94  C) 71  D) 68  E) 88
Speed = 280/28= 
<gadget id="calculator">280/28</gadget>
<output>10</output>
10 m/sec.   Required time= (280 + 660)/10= 
<gadget id="calculator">(280 + 660)/10</gadget>
<output>94</output>
94 sec.   Answer: 94
<result>B</result>
A train 280 m long passed a pole in 28 sec. How long will it take to pass a platform 660 m long?