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A , B and C can finish a task in 42 days...

A , B and C can finish a task in 42 days, 84 days and 28 days, respectively. A started the work. B joined him after 3 days. If C joined them after 5 days from the beginning, then for how many days did A work till the completion of the task?

A

20

B

15

C

17

D

18

Text Solution

Verified by Experts

The correct Answer is:
C
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