Multiple choice

A can build a wall in $25$ days and $B$ can demolish the same wall in $80$ days and $C$ can build the same wall in $60$ days. If they work on consecutive day one after another starting from $A$ on the first day. Then in how many days will the work be completed?

  1. $67\dfrac{49}{53}\ days$
  2. $67\dfrac{17}{24}\ days$
  3. $66\dfrac{17}{24}\ days$
  4. $68\dfrac{17}{24}\ days$
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A Correct answer