Question

A and B working separately can do a piece of work in 9 and 15 days respectively. If they work for a day alternately, with A beginning, then the work will be complete in :

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Work rate of A = 9/100 = 11.11% work per day

Work rate of B = 15/100 = 6.66% work per day

They together can do (A + B) = 11.11 + 6.66 = 18% work per day

They are working in alternate day, so we take 2 days = 1 unit of day

Therefore, in one unit of day they can complete 18% of work

(A + B) can complete 90% of work in 5 units of days. i.e. (5 × 18)

And the rest 10% work will be completed by A in Next day

So, total number of day,

= 5 Unit of days + 1 day of A

= 2 × 5 + 1 = 11 days