Question

36. A can complete a job in 36 days.
B is twice as efficient as A. A
started the work and was joined
by B after a few days. If the
whole work was completed in 15
days, after how many days from
the time A started working did B
join with A?
(1) 42 days (2) 4 days
5 days (4) 5 days
(3) 5
(5) None of these​

Answer 1

Step-by-step explanation:

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