Question

Three persons A , B and C ran on a round track. A takes 100 seconds, B takes 110 seconds and C takes 120 seconds to run a round. If they start together at 3 : 05 pm at what time do they meet again?

Answer 1

So according to the condition
we have to find lcm

the pic will help you to find lcm

so LCM = 6600

now 6600/60 to get no. of minutes

110 minute

so if we add 110 minute to 3: 05

so they will meet again at 4:55