Two persons start running simultaneously around a circular track of length 500 m from the same point at speeds of 16 kmph and 20 kmph. When will they meet for the first time any where on the track if they
are moving in the opposite direction ?
Pick:
A) 144
B) 36
C) 50
D) 32
E) 38
Time taken to meet the first time = length of track/relative speed   = 500/ (16+20) (5/18)   = 500/36 *(18/5)= 
<gadget id="calculator">500/36 *(18/5)</gadget>
<output>50</output>
50 sec.   Answer : 50
<result>C</result>
Two persons start running simultaneously around a circular track of length 500 m from the same point at speeds of 16 kmph and 20 kmph. When will they meet for the first time any where on the track if they
are moving in the opposite direction ?