İşçi Problemi
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27. Müəyyən bir işi 7 nəfər 20 gün ərzində yerinə yetirir. Dörd gün işlədikdən sonra onlara həmin məhsuldarlıqla işləyən 9 nəfər qoşuldu. Bu işi görmək üçün cəmi neçə gün sərf olundu?
a) 9 b) 10 c) 11 d) 12 e) 13
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Step by Step Written Solution
Hi Rahil, let's solve this problem together. We are told that 7 people can complete a certain job in 20 days. Four days later, 9 more people join the group. We need to find the total time spent to complete the job.
Məsələnin Həlli
Initially, the job is meant to be done by 7 people in 20 days. Let's define the total work in terms of man-days.
These 7 people work for 4 days first. Let's calculate how much work they completed during this time.
Now, we subtract the completed work from the total work to see what is left.
So we have 112 man-days of work remaining. At this point, 9 more people join the original 7.
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