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Question

Jay and Anup can do a job, each working alone in 30 and 15 days respectively. Jay started the work and after a few days, Anup joined him. They completed the work in 18 days from the start. After how many days, did Anup join A?___

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Solution

Since Jay does (130)th of the work in one day, total work done by Jay in 18 days

=1830=35

Remaining (25)th work was done by Anup

Since Anup does (115)th of the work = 2/5/(1/15) (25)(115) = 6 days.

So, Anup joined Jay after (18−6) = 12 days.


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