Five bulls participate in a race, they started running simultaneously from a circular track. They took 100 sec, 200 sec, 300 sec, 400 sec, and 500 sec to complete one round. After how much time do they meet at the starting point for the first time?
1
1 hr
2
1 hr 20 min
3
2 hr 20 min
4
1 hr 40 min