- Least Common Multiple (LCM)Choice J$$4n=14m \\$$ $$ \Rightarrow n=7,\ m=2 \\$$ $$ \Rightarrow t=4\times7=28 \ seconds$$
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- Least Common Multiple (LCM)Choice J$$4n=14m \\$$ $$ \Rightarrow n=7,\ m=2 \\$$ $$ \Rightarrow t=4\times7=28 \ seconds$$
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