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A, B and C take 20, 30 and 60 days. All start; A leaves after 4 days and B after 8 days; C finishes. How many days does the job take in all?

Competition practiceTime & Work / Pipes
  • A28 days
  • B30 days
  • C32 days
  • D36 days

Step-by-Step Solution

In units of 60: A 3, B 2, C 1 a day. 4 days all: 24. Days 5–8, B and C: 12. Left 24 for C: 24 days. Total 32.
Answer: C) 32 days

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