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Q53 (CISF/2022) Miscellaneous & General Knowledge › Important Days, Places & Events

Suppose, 'A' can complete a job in 10 days, and 'A' and 'B' together can complete the same job in 6 days. In how many days can 'B' alone complete the job ?

Result
Your answer: —  ·  Correct: A

Explanation

To find the time taken by 'B' alone, we use the concept of work rates, where the rate of work is the reciprocal of the time taken to complete the job.

  • Work rate of 'A' = 1⁄10 job/day
  • Work rate of 'A' and 'B' together = 1⁄6 job/day

The work rate of 'B' can be determined by subtracting A's rate from their combined rate:

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