A and B go around a circular track of length 300 m on a cycle at speeds of 34 kmph and 50 kmph. After how much time will they meet for the first time at the starting point? Choose the correct option:
A) 120 sec
B) 60 sec
C) 186 sec
D) 167 sec
E) 168 sec
Time taken to meet for the first time at the starting point   = LCM { length of the track / speed of A , length of the track / speed of B}   = LCM { 300/ (36 * 5/18) , 300/ (54 * 5 /18) }   = LCM (30, 20)   =60 sec.   Answer:60 sec
<result>B</result>
A and B go around a circular track of length 300 m on a cycle at speeds of 34 kmph and 50 kmph. After how much time will they meet for the first time at the starting point?