# Finding the mass

Algebra Level pending

A pipe is in the form of a hollow cylinder as shown in the figure above. Find its mass in kilograms when its length is $$1.5$$ $$m$$, its outside diameter is $$300$$ $$mm$$, its inside diameter is $$200$$ $$mm$$ and its density is $$5500$$ $$\frac{kg}{m^3}$$.