WBCS.LIVE practice question

A can complete a task alone in 8 days, while B takes 12 days to do it by himself. Together with C it takes them 4 days to complete the work. If C and D together can complete the task in 15 days, then how many days will D need to complete the task by himself?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 36 days
  2. 40 days
  3. 32 days
  4. 30 days

Correct answer and explanation

Correct answer: 40 days