Question

three lectures entered to race around a track. the first lecture takes 60 seconds to complete one lap, the second lecture takes takes 48 seconds to complete one lap and the third lecture takes 45 seconds to complete one lap. if all three lectures start the race at the same time at 07:10, when will they be at the same point again?

Answer 1

Answer:

they will meet at 7:34 or after 24mins

Step-by-step explanation:

let's take the LCM

2 60,48,45

2 30,24,45

2 15,12,45

2 15,6,45

2 15,3,45

3 5,1,15

3 5,1,5

5 1,1,1

LCM = 2×2×2×2×2×3×3×5

= 1440

they will meet after 1440 sec

1min = 60sec

= 1440/60

= 24 mins

7:10 + 00:24= 7:34