A team of workers was employed by a cont...

A team of workers was employed by a contractor who undertook to finish 360 pieces of an article in a certain number of days. Making four more pieces per day than was planned, they could complete the job a day ahead of schedule. How many days did they take to complete the job? `8\ d a y s` b. `12\ d a y s` c. `9\ d a y s` d. `10\ d a y s`

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