A can do a job in 20 days, B in 30 days and C in 60 days. If A is helped by B and C on every third day then in how many days will the job be finished?
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Answer:
Correct Answer:
B) 15 days
Description for Correct answer:
A works alone for 2 days and finishes 220 or 110th of the work.
On the 3rd day A, B and C finish 120+130+160=110th of the work.
or in 3 days, 110+110=15th of the work is completed.
Therefore, the job will be completed in 5×3 = 15 days.
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