A and B go around a circular track of length 600 m on a cycle at speeds of 18 kmph and 48 kmph. After how much time will they meet for the first time at the starting point?
Choose the correct choice from the following answers
A) 120 sec  B) 176 sec  C) 360 sec  D) 187 sec  E) 189 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 { 600/ (18 * 5/18) , 600/ (48 * 5 /18) }   = 360 sec.   Answer: 360 sec
<result>C</result>
A and B go around a circular track of length 600 m on a cycle at speeds of 18 kmph and 48 kmph. After how much time will they meet for the first time at the starting point?