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Q:

Aman and Ajay can build a wall in 9 days and 12 days respectively. In how many days can they finish the work if they work together?

  • 1
    $$ {5{1\over 7}}$$
  • 2
    $$ {11{1\over 2}}$$
  • 3
    2
  • 4
    7
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Answer : 1. "$$ {5{1\over 7}}$$"

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