​​​​​​​​To separate a mixture of potatoes, salt, and sawdust, follow these steps:​

Use a sieve to separate the sawdust, as it is a fine solid that can be easily removed from the mixture.
Add water to the mixture to dissolve the salt.
Filter the mixture to separate the solid potatoes from the saltwater solution.
Evaporate the water from the saltwater solution to recover the salt. The potatoes can be dried if needed.