A trolley which travels at a constant speed and can cover the platform of length 300m in two minute. How long it will take a train of length 200m and having a speed 60kph to pass the trolley?
Choose the correct choice from the following answers:
A) 11.21
B) 14.11
C) 16.32
D) 18.35
E) 20.45
Speed of the trolley= 300/120= 
<gadget id="calculator">300/120</gadget>
<output>5/2 = around 2.5</output>
2.5m/s   Speed of the train= 60kph = 16.67m/s   Relative speed of train with respect to trolley=16.67-2.5= 
<gadget id="calculator">16.67-2.5</gadget>
<output>14.17</output>
14.17m/s   Time taken by the train to pass the trolley= 200/14.17=14.11s   Answer: 14.11
<result>B</result>
A trolley which travels at a constant speed and can cover the platform of length 300m in two minute. How long it will take a train of length 200m and having a speed 60kph to pass the trolley?