A takes twice as much time as B and thrice as much as C to finish a piece of work. They together finish the work in one day. Find the time taken by A to finish the work.
(A) 6 (B) 2 (C) 3 (D) 5
A and B can do a job alone in 20 days and 30 days respectively. In how many days the job will be completed if they work together ?
(A) 12 days (B) 24 days (C) 15 days (D) 28 days
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Answer:
6 and 24................
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