Question

Work and T
15/A can do a work in 20 days and B can do
in 10 days. A starts the work and works
alone for 5 days. Then, B joins A and
they finish the work. In how many days
the work gets finished? [NIFT 2015]
(a) 10 (6) 12 (c) 9 (d) 8
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Answer 1

Answer:

12days is the right answer