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Farid can complete a job in 12 hours, and Jibon can complete the same job in 8 hours. Farid starts the job at 9 a.m., and stops working at 3 p.m. If Jibon starts working at 4 p.m. to complete the remaining job, at what time is the job finished?

Farid can complete a job in 12 hours, and Jibon can complete the same job in 8 hours. Farid starts the job at 9 a.m., and stops working at 3 p.m. If Jibon starts working at 4 p.m. to complete the remaining job, at what time is the job finished? Correct Answer 8 p.m.

Farid works from 9 am to 3 pm = 6 hours Farid can complete the job in 12 hours. So, in 6 hours, he can complete 6/12 or 1/2 of the job. Now, Jibon has to complete the rest 1/2 of the job. But, he can complete the job in 8 hours. So, he will take 8/2 or 4 hours only to complete the rest of the job. If Jibon starts working from 4 pm, the job will be completed by 8 pm.

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