General Aptitude › Time and Work › Question #4631
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QIf A and B can finish a task in 30 days when working together, and B leaves after 20 days of working together, and A finishes the remaining work in 20 days, how long can A finish the task on their own?

ID: #4631 Time and Work 153 views
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#4631Q ID
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Time and WorkTopic
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  • A 30 ✔ ✖
  • B 40 ✔ ✖
  • C 50 ✔ ✖
  • D 60 ✔ ✖
Correct Answer

Explanation

The work rate of A and B together is 1/30 of the task per day,
and they work together for 20 days, completing 2/3 of the task.
The remaining work is 1/3 of the task, which A finishes in 20 days.
This means that A's work rate is 1/3 of the task per day.
Therefore, it will take A 60 days to complete the task on their own.

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