A, B, and C all begin running in the same direction around a circular stadium at the same time. Starting at the same position, A completes a round in 252 seconds, B in 308 seconds, and C in 198 seconds. When will they return to their original starting point?
A. 26 minutes and 18 seconds
B. 42 minutes and 36 seconds
C. 45 minutes
D. 46 minutes and 12 seconds
Answer:D
A, B, and C all begin running in the same direction around a circular stadium at the same time. Starting at the same position, A completes a round in 252 seconds, B in 308 seconds, and C in 198 seconds. When will they return to their original starting point?
A. 26 minutes and 18 seconds B. 42 minutes and 36 seconds C. 45 minutes D. 46 minutes and 12 seconds
Explanation: 252, 308, and 198 L.C.M. = 2772.As a result, A, B, and C will reunite at the beginning location in 2772 seconds, or 46 minutes and 12 seconds.