You cannot use MS-Project to model this kind of task scheduling behaviour since its resource loading and task scheduling is based on knowing how much work (expressed as time) is needed to complete a task.
You can force MS-Project to have a 10-day duration, irrespective of the resources applied, by setting Work=10d and making the task Fixed Duration (both before adding any resources), but that cannot be used to divide up piece-work amongst resources assigned to that task.