Two persons start running simultaneously around a circular track of length 520 m from the same point at speeds of 18 kmph and 30 kmph. When will they meet for the first time any where on the track if they
are moving in the opposite direction ?	Choose the correct choice from the following:  A) 144  B) 39  C) 124  D) 32  E) 38
Time taken to meet the first time = length of track/relative speed   = 520/ (18 +30) (5/18)   = 520/48 *(18/5)= 
<gadget id="calculator">520/48 *(18/5)</gadget>
<output>39</output>
39 sec.   Answer : 39
<result>B</result>
Two persons start running simultaneously around a circular track of length 520 m from the same point at speeds of 18 kmph and 30 kmph. When will they meet for the first time any where on the track if they
are moving in the opposite direction ?