What is Dimensional Formula of Linear Mass Density?

Linear Mass Density is defined as measure of mass per unit of length.

Mathematically,
Linear Mass Density = Mass / Length.

Dimensional Formula of Mass = M¹L⁰T⁰.
Dimensional Formula of Length = M⁰L¹T⁰.

Putting these values in above equation we get,

Dimensional Formula of Linear Mass Density = M¹L^-1T⁰.
SI unit of Linear Mass Density is kg m^-1.

Please note : Linear mass density is the quantity of mass per unit length. Here length is a simple metre quantity. Linear densities are basically used for long thin objects. Please do not get confused between Linear mass density and density.