A and B go around a circular track of length 300 m on a cycle at speeds of 18 kmph and 54 kmph. After how much time will they meet for the first time at the starting point?	Select
A) 120 sec  B) 198 sec  C) 60 sec  D) 665 sec  E) 276 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/ (90 * 5/18) , 300/ (54 * 5 /18) }   = LCM (12, 20) = 60 sec.   Answer:60 sec
<result>C</result>
A and B go around a circular track of length 300 m on a cycle at speeds of 18 kmph and 54 kmph. After how much time will they meet for the first time at the starting point?