A jogger running at 9 km/hr along side a railway track is 240 m ahead of the engine of a 120 m long train running at 45 km/hr in the same direction. In how much time will the train pass the jogger?
Pick one.
A) 22
B) 77
C) 36
D) 71
E) 81
Speed of train relative to jogger = 45 - 9= 
<gadget id="calculator">45 - 9</gadget>
<output>36</output>
36 km/hr.= 36 * 5/18= 
<gadget id="calculator">36 * 5/18</gadget>
<output>10</output>
10 m/sec.   Distance to be covered= 240 + 120= 
<gadget id="calculator">240 + 120</gadget>
<output>360</output>
360 m.   Time taken= 360/10= 
<gadget id="calculator">360/10</gadget>
<output>36</output>
36 sec.   Answer:36
<result>C</result>
A jogger running at 9 km/hr along side a railway track is 240 m ahead of the engine of a 120 m long train running at 45 km/hr in the same direction. In how much time will the train pass the jogger?