Question

how can I separate a mixture of salt sand oil and water​

Answer 1

Answer:

oil and water can be separated by separating funnel.

Explanation:

sand,salt and water can be separated by evaporation.

Answer 2

Oil being immiscible and less dense than water will float on top, so it can be easily removed by scooping it out from water. Sand will sink at the bottom, Salt will dissovle in water, so filter this solution thereby separating the sand particles then let the water evaporate to reclain the salt.