Two cars $S_1$ and $S_2$ are moving in coplanar concentric circular tracks in the opposite sense with the periods of revolution $3 \, min$ and $24 \, min$,respectively. At time $t = 0$,the cars are farthest apart. Then,the two cars will be

  • A
    closest to each other at $t = 12 \, min$ and farthest at $t = 18 \, min$
  • B
    closest to each other at $t = 3 \, min$ and farthest at $t = 24 \, min$
  • C
    closest to each other at $t = 6 \, min$ and farthest at $t = 12 \, min$
  • D
    closest to each other at $t = 12 \, min$ and farthest at $t = 24 \, min$

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