Seema,Meena,and Reena start jogging around a | vedclass

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(D) To find when they will meet again at the starting point,we need to calculate the Least Common Multiple $(LCM)$ of the time taken by each person to

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(D) To find when they will meet again at the starting point,we need to calculate the Least Common Multiple $(LCM)$ of the time taken by each person to complete one round.The times are $54 	ext{ seconds}$,$42 	ext{ seconds}$,and $63 	ext{ seconds}$.Prime factorization:$54 = 2 	imes 3^3$$42 = 2 	imes 3 	imes 7$$63 = 3^2 	imes 7$$LCM = 2 	imes 3^3 	imes 7 = 2 	imes 27 	imes 7 = 378 	ext{ seconds}$.To convert seconds into minutes,divide by $60$:$\frac{378}{60} = 6.3 	ext{ minutes}$.Rounding to the nearest whole number,they will meet after approximately $6 	ext{ minutes}$.

Seema,Meena,and Reena start jogging around a circular stadium and complete one round in $54 \text{ seconds}$,$42 \text{ seconds}$,and $63 \text{ seconds}$ respectively. Approximately after how many minutes will they meet again at the starting point?

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