Four runners started running simultaneously from a point ok a circular track. They took 200 s, 300 s, 360 s and 450 s to complete one round. After how much time do they meet at the starting point for the first time?
A)1800 s
B)3600 s
C)2400 s
D)4800 s
Correct Answer:
A
Solution :
Required time = LCM of 200, 300, 360 and 450 s = 1800 s