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Question

A and B together finish a work in 15 months. They worked together for 10 months and then B left. After another 12 months, A finished the remaining work. In how many months A alone can finish the job?


  1. 30

  2. 24

  3. 36

  4. None of these

  5. 40


Solution

The correct option is C

36


(A + B)'s 10 month's work = (115 × 10) = 23
Remaining work = (1  23) = 13

Now, 13 work is done by A in 12 months

Whole work will be done by A in (12 × 3) = 36 months

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